List of Major League Baseball players (Kj–Kz)
# List of Major League Baseball players (Kj–Kz)

The following is a list of Major League Baseball players, retired or active.

## List of Major League Baseball players

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z

## Kj through Kz

| Name | Debut | Final game | Position | Teams |
| - | - | - | - | - |
| Hugo Klaerner | September 10, 1934 | September 22, 1934 | Pitcher | Chicago White Sox |
| Fred Klages | September 11, 1966 | September 11, 1967 | Pitcher | Chicago White Sox |
| Danny Klassen | July 4, 1998 | September 25, 2003 | Utility infielder | Arizona Diamondbacks, Detroit Tigers |
| Billy Klaus | April 16, 1952 | May 17, 1963 | Shortstop | Boston Braves/Milwaukee Braves, Boston Red Sox, Baltimore Orioles, Washington Senators, Philadelphia Phillies |
| Bobby Klaus | April 21, 1964 | October 3, 1965 | Second baseman | Cincinnati Reds, New York Mets |
| Al Klawitter | September 20, 1909 | May 30, 1913 | Pitcher | New York Giants, Detroit Tigers |
| Tom Klawitter | April 14, 1985 | May 21, 1985 | Pitcher | Minnesota Twins |
| Ollie Klee | August 10, 1925 | August 26, 1925 | Outfielder | Cincinnati Reds |
| Chuck Klein β | July 30, 1928 | June 11, 1944 | Outfielder | Philadelphia Phillies, Chicago Cubs, Pittsburgh Pirates |
| Lou Klein | April 21, 1943 | September 30, 1951 | Second baseman | St. Louis Cardinals, Cleveland Indians, Philadelphia Athletics |
| Hal Kleine | April 26, 1944 | June 1, 1945 | Pitcher | Cleveland Indians |
| Ted Kleinhans | April 20, 1934 | April 20, 1938 | Pitcher | Philadelphia Phillies, Cincinnati Reds, New York Yankees |
| Nubs Kleinke | April 25, 1935 | October 3, 1937 | Pitcher | St. Louis Cardinals |
| Red Kleinow | May 3, 1904 | September 6, 1911 | Catcher | New York Highlanders, Boston Red Sox, Philadelphia Phillies |
| Ed Klepfer | July 4, 1911 | September 5, 1919 | Pitcher | New York Highlanders/Yankees, Chicago White Sox, Cleveland Indians |
| Ryan Klesko | September 12, 1992 | September 25, 2007 | Utility player | Atlanta Braves, San Diego Padres, San Francisco Giants |
| Jay Kleven | June 20, 1976 | June 27, 1976 | Catcher | New York Mets |
| Ed Klieman | September 24, 1943 | June 2, 1950 | Pitcher | Cleveland Indians, Washington Senators, Chicago White Sox, Philadelphia Athletics |
| Lou Klimchock | September 27, 1958 | August 2, 1970 | Utility infielder | Kansas City Athletics, Milwaukee Braves, Washington Senators (1961–71), New York Mets, Cleveland Indians |
| Ron Klimkowski | September 15, 1969 | September 22, 1972 | Pitcher | New York Yankees, Oakland Athletics |
| Bob Kline | September 17, 1930 | July 15, 1934 | Pitcher | Boston Red Sox, Philadelphia Athletics, Washington Senators |
| Bobby Kline | April 11, 1955 | September 25, 1955 | Shortstop | Washington Senators |
| Ron Kline | April 21, 1952 | June 13, 1970 | Pitcher | Los Angeles Angels, Detroit Tigers, Washington Senators (1961–71), Minnesota Twins, San Francisco Giants, Boston Red Sox, Atlanta Braves |
| Steve Kline (RHP) | July 10, 1970 | July 24, 1977 | Pitcher | New York Yankees, Cleveland Indians, Atlanta Braves |
| Steve Kline (LHP) | April 2, 1997 | September 25, 2007 | Pitcher | Cleveland Indians, Montreal Expos, St. Louis Cardinals, Baltimore Orioles, San Francisco Giants |
| Bill Kling | August 13, 1891 | April 20, 1895 | Pitcher | Philadelphia Phillies, Baltimore Orioles (NL), Louisville Colonels |
| Johnny Kling | September 11, 1900 | September 21, 1913 | Catcher | Chicago Orphans/Cubs, Boston Rustlers/Braves, Cincinnati Reds |
| Rudy Kling | September 21, 1902 | September 26, 1902 | Shortstop | St. Louis Cardinals |
| Scott Klingenbeck | June 2, 1994 | June 23, 1998 | Pitcher | Baltimore Orioles, Minnesota Twins, Cincinnati Reds |
| Bob Klinger | April 19, 1938 | September 23, 1947 | Pitcher | Pittsburgh Pirates, Boston Red Sox |
| Joe Klinger | September 13, 1927 | May 13, 1930 | Utility player | New York Giants, Chicago White Sox |
| Joe Klink | April 9, 1987 | May 17, 1996 | Pitcher | Minnesota Twins, Oakland Athletics, Florida Marlins, Seattle Mariners |
| Johnny Klippstein | May 3, 1950 | May 27, 1967 | Pitcher | Chicago Cubs, Cincinnati Redlegs, Los Angeles Dodgers, Washington Senators (1961–71), Cincinnati Reds, Philadelphia Phillies, Minnesota Twins, Detroit Tigers |
| Fred Klobedanz | August 20, 1896 | September 5, 1902 | Pitcher | Boston Beaneaters |
| Stan Klopp | April 30, 1944 | August 5, 1944 | Pitcher | Boston Braves |
| Nap Kloza | August 16, 1931 | June 26, 1932 | Outfielder | St. Louis Browns |
| Corey Kluber | September 1, 2011 | | Pitcher | Cleveland Indians |
| Joe Klugmann | September 23, 1921 | July 19, 1925 | Second baseman | Chicago Cubs, Brooklyn Dodgers, Cleveland Indians |
| Elmer Klumpp | April 17, 1934 | May 3, 1937 | Catcher | Washington Senators, Brooklyn Dodgers |
| Billy Klusman | June 21, 1888 | May 8, 1890 | Second baseman | Boston Beaneaters, St. Louis Browns |
| Ted Kluszewski | April 18, 1947 | October 1, 1961 | First baseman | Cincinnati Reds/Redlegs, Pittsburgh Pirates, Chicago White Sox, Los Angeles Angels |
| Mickey Klutts | July 7, 1976 | July 26, 1983 | Third baseman | New York Yankees, Oakland Athletics, Toronto Blue Jays |
| Clyde Kluttz | April 20, 1942 | September 27, 1952 | Catcher | Boston Braves, New York Giants, St. Louis Cardinals, Pittsburgh Pirates, St. Louis Browns, Washington Senators |
| Joe Kmak | April 6, 1993 | August 27, 1995 | Catcher | Milwaukee Brewers, Chicago Cubs |
| Otto Knabe | October 3, 1905 | September 25, 1916 | Second baseman | Pittsburgh Pirates, Philadelphia Phillies, Baltimore Terrapins, Chicago Cubs |
| Brent Knackert | April 10, 1990 | June 4, 1996 | Pitcher | Seattle Mariners, Boston Red Sox |
| Chris Knapp | September 4, 1975 | October 5, 1980 | Pitcher | Chicago White Sox, California Angels |
| Cotton Knaupp | August 30, 1910 | April 28, 1911 | Shortstop | Cleveland Naps |
| Frank Knauss | June 25, 1890 | May 29, 1895 | Pitcher | Columbus Solons, Cleveland Spiders, Cincinnati Reds, New York Giants |
| Rudy Kneisch | September 21, 1926 | September 26, 1926 | Pitcher | Detroit Tigers |
| Phil Knell | July 6, 1888 | September 29, 1895 | Pitcher | Pittsburgh Alleghenys, Philadelphia Athletics (1890–91), Columbus Solons, Washington Senators (NL), Philadelphia Phillies, Pittsburgh Pirates, Louisville Colonels, Cleveland Spiders |
| Bob Knepper | September 10, 1976 | June 24, 1990 | Pitcher | San Francisco Giants, Houston Astros |
| Charlie Knepper | May 26, 1899 | September 26, 1899 | Pitcher | Cleveland Spiders |
| Lou Knerr | April 17, 1945 | June 7, 1947 | Pitcher | Philadelphia Athletics, Washington Senators |
| Elmer Knetzer | September 11, 1909 | June 18, 1917 | Pitcher | Brooklyn Superbas/Dodgers, Pittsburgh Rebels, Boston Braves, Cincinnati Reds |
| Alan Knicely | August 12, 1979 | October 4, 1986 | Catcher | Houston Astros, Cincinnati Reds, Philadelphia Phillies, St. Louis Cardinals |
| Austin Knickerbocker | April 19, 1947 | September 28, 1947 | Outfielder | Philadelphia Athletics |
| Bill Knickerbocker | April 12, 1933 | September 17, 1942 | Shortstop | Cleveland Indians, St. Louis Browns, New York Yankees, Chicago White Sox, Philadelphia Athletics |
| Brandon Knight | June 5, 2001 | September 17, 2008 | Pitcher | New York Yankees, New York Mets |
| George Knight | September 28, 1875 | September 28, 1875 | Pitcher | New Haven Elm Citys |
| Jack Knight | September 20, 1922 | April 25, 1927 | Pitcher | St. Louis Cardinals, Philadelphia Phillies, Boston Braves |
| Joe Knight | May 16, 1884 | October 3, 1890 | Outfielder | Philadelphia Quakers, Cincinnati Reds |
| John Knight | April 14, 1905 | October 4, 1913 | Utility infielder | Philadelphia Athletics, Boston Americans, New York Highlanders, Washington Senators, New York Yankees |
| Lon Knight | September 4, 1875 | October 10, 1885 | Outfielder | Philadelphia Athletics (1860–76), Worcester Ruby Legs, Detroit Wolverines, Philadelphia Athletics (AA), Providence Grays |
| Ray Knight | September 10, 1974 | October 2, 1988 | Third baseman | Cincinnati Reds, Houston Astros, New York Mets, Baltimore Orioles, Detroit Tigers |
| Pete Knisely | September 4, 1912 | September 23, 1915 | Outfielder | Cincinnati Reds, Chicago Cubs |
| Chuck Knoblauch | April 9, 1991 | September 27, 2002 | Second baseman | Minnesota Twins, New York Yankees, Kansas City Royals |
| Mike Knode | June 28, 1920 | September 26, 1920 | Outfielder | St. Louis Cardinals |
| Ray Knode | June 30, 1923 | September 26, 1926 | First baseman | Cleveland Indians |
| Justin Knoedler | October 3, 2004 | September 30, 2006 | Catcher | San Francisco Giants |
| Punch Knoll | April 27, 1905 | October 4, 1905 | Outfielder | Washington Senators |
| Hub Knolls | May 1, 1906 | May 6, 1906 | Pitcher | Brooklyn Superbas |
| Bobby Knoop | April 13, 1964 | September 20, 1972 | Second baseman | Los Angeles/California Angels, Chicago White Sox, Kansas City Royals |
| Randy Knorr | September 5, 1991 | September 9, 2001 | Catcher | Toronto Blue Jays, Houston Astros, Florida Marlins, Texas Rangers, Montreal Expos |
| Fritz Knothe | April 12, 1932 | August 30, 1933 | Third baseman | Boston Braves, Philadelphia Phillies |
| George Knothe | April 25, 1932 | May 25, 1932 | Second baseman | Philadelphia Phillies |
| Eric Knott | September 1, 2001 | August 26, 2003 | Pitcher | Arizona Diamondbacks, Montreal Expos |
| Jack Knott | April 13, 1933 | May 15, 1946 | Pitcher | St. Louis Browns, Chicago White Sox, Philadelphia Athletics |
| Jon Knott | May 30, 2004 | July 22, 2007 | Outfielder | San Diego Padres, Baltimore Orioles |
| Gary Knotts | July 28, 2001 | October 2, 2004 | Pitcher | Florida Marlins, Detroit Tigers |
| Joe Knotts | September 18, 1907 | September 28, 1907 | Catcher | Boston Doves |
| Ed Knouff | July 1, 1885 | June 7, 1889 | Pitcher | Philadelphia Athletics (AA), Baltimore Orioles (AA), St. Louis Browns (AA), Cleveland Blues |
| Jake Knowdell | May 15, 1874 | August 17, 1878 | Catcher | Brooklyn Atlantics, Milwaukee Grays |
| Darold Knowles | April 18, 1965 | April 18, 1980 | Pitcher | Baltimore Orioles, Philadelphia Phillies, Washington Senators (1961–71), Oakland Athletics, Chicago Cubs, Texas Rangers, Montreal Expos, St. Louis Cardinals |
| Jimmy Knowles | May 2, 1884 | October 12, 1892 | Third baseman | Pittsburgh Alleghenys, Brooklyn Atlantics (AA), Washington Nationals (1886–1889), New York Metropolitans, Rochester Broncos, New York Giants |
| Tom Knowlson | July 3, 1915 | September 13, 1915 | Pitcher | Philadelphia Athletics |
| Bill Knowlton | September 3, 1920 | September 3, 1920 | Pitcher | Philadelphia Athletics |
| Andy Knox | September 19, 1890 | October 12, 1890 | First baseman | Philadelphia Athletics (AA) |
| Cliff Knox | July 1, 1924 | July 14, 1924 | Catcher | Pittsburgh Pirates |
| John Knox | August 1, 1972 | September 26, 1975 | Second baseman | Detroit Tigers |
| Kurt Knudsen | May 16, 1992 | June 4, 1994 | Pitcher | Detroit Tigers |
| Mark Knudson | July 8, 1985 | May 14, 1993 | Pitcher | Houston Astros, Milwaukee Brewers, Colorado Rockies |
| Nick Koback | July 29, 1953 | July 4, 1955 | Catcher | Pittsburgh Pirates |
| Masahide Kobayashi | April 2, 2008 | May 7, 2009 | Pitcher | Cleveland Indians |
| Kevin Kobel | September 8, 1973 | June 7, 1980 | Pitcher | Milwaukee Brewers, New York Mets |
| Alan Koch | July 26, 1963 | September 26, 1964 | Pitcher | Detroit Tigers, Washington Senators (1961–71) |
| Barney Koch | July 23, 1944 | October 1, 1944 | Second baseman | Brooklyn Dodgers |
| Billy Koch | May 5, 1999 | August 26, 2004 | Pitcher | Toronto Blue Jays, Oakland Athletics, Chicago White Sox, Florida Marlins |
| Brad Kocher | April 24, 1912 | October 5, 1916 | Catcher | Detroit Tigers, New York Giants |
| Dick Koecher | September 29, 1946 | October 2, 1948 | Pitcher | Philadelphia Phillies |
| Pete Koegel | September 1, 1970 | October 2, 1972 | Utility player | Milwaukee Brewers, Philadelphia Phillies |
| Ben Koehler | April 23, 1905 | October 7, 1906 | Outfielder | St. Louis Browns |
| Pip Koehler | April 22, 1925 | September 12, 1925 | Outfielder | New York Giants |
| Brian Koelling | August 21, 1993 | September 3, 1993 | Utility infielder | Cincinnati Reds |
| Len Koenecke | April 12, 1932 | September 15, 1935 | Outfielder | New York Giants, Brooklyn Dodgers |
| Mark Koenig | September 8, 1925 | September 27, 1936 | Shortstop | New York Yankees, Detroit Tigers, Chicago Cubs, Cincinnati Reds, New York Giants |
| Will Koenigsmark | September 10, 1919 | September 10, 1919 | Pitcher | St. Louis Cardinals |
| Elmer Koestner | April 23, 1910 | July 1, 1914 | Pitcher | Cleveland Naps, Chicago Cubs, Cincinnati Reds |
| Henry Kohler | July 12, 1871 | September 9, 1874 | Utility player | Fort Wayne Kekiongas, Baltimore Marylands, Baltimore Canaries |
| Joe Kohlman | September 26, 1937 | May 26, 1938 | Pitcher | Washington Senators |
| Ryan Kohlmeier | July 29, 2000 | October 5, 2001 | Pitcher | Baltimore Orioles |
| Michael Kohn | July 26, 2010 | | Pitcher | Los Angeles Angels of Anaheim |
| Dick Kokos | July 8, 1948 | May 10, 1954 | Outfielder | St. Louis Browns/Baltimore Orioles |
| Brandon Kolb | May 12, 2000 | September 19, 2001 | Pitcher | San Diego Padres, Milwaukee Brewers |
| Danny Kolb | June 4, 1999 | June 20, 2007 | Pitcher | Texas Rangers, Milwaukee Brewers, Atlanta Braves, Pittsburgh Pirates |
| Eddie Kolb | October 15, 1899 | October 15, 1899 | Pitcher | Cleveland Spiders |
| Gary Kolb | September 7, 1960 | September 1, 1969 | Outfielder | St. Louis Cardinals, Milwaukee Braves, New York Mets, Pittsburgh Pirates |
| Don Kolloway | September 16, 1940 | April 21, 1953 | Second baseman | Chicago White Sox, Detroit Tigers, Philadelphia Athletics |
| Ray Kolp | April 16, 1921 | September 21, 1934 | Pitcher | St. Louis Browns, Cincinnati Reds |
| Karl Kolseth | September 30, 1915 | October 3, 1915 | First baseman | Baltimore Terrapins |
| Hal Kolstad | April 22, 1962 | July 17, 1963 | Pitcher | Boston Red Sox |
| Shane Komine | July 30, 2006 | July 17, 2007 | Pitcher | Oakland Athletics |
| Satoru Komiyama | April 4, 2002 | September 11, 2002 | Pitcher | New York Mets |
| Fred Kommers | June 25, 1913 | September 26, 1914 | Outfielder | Pittsburgh Pirates, St. Louis Terriers, Baltimore Terrapins |
| Brad Komminsk | August 14, 1983 | October 5, 1991 | Outfielder | Atlanta Braves, Milwaukee Brewers, Cleveland Indians, San Francisco Giants, Baltimore Orioles, Oakland Athletics |
| Paul Konerko | September 8, 1997 | | First baseman | Los Angeles Dodgers |
| Ed Konetchy | June 29, 1907 | October 1, 1921 | First baseman | St. Louis Cardinals, Pittsburgh Pirates, Pittsburgh Rebels, Boston Braves, Brooklyn Robins, Philadelphia Phillies |
| Doug Konieczny | September 11, 1973 | April 30, 1977 | Pitcher | Houston Astros |
| Alex Konikowski | June 16, 1948 | July 29, 1954 | Pitcher | New York Giants |
| Mike Konnick | October 3, 1909 | May 24, 1910 | Catcher | Cincinnati Reds |
| Bruce Konopka | June 7, 1942 | September 29, 1946 | First baseman | Philadelphia Athletics |
| Jim Konstanty | June 18, 1944 | September 19, 1956 | Pitcher | Cincinnati Reds, Boston Braves, Philadelphia Phillies, New York Yankees, St. Louis Cardinals |
| George Kontos | September 10, 2011 | | Pitcher | New York Yankees |
| Dennis Konuszewski | August 4, 1995 | August 4, 1995 | Pitcher | Pittsburgh Pirates |
| Dae-Sung Koo | April 4, 2005 | August 20, 2005 | Pitcher | New York Mets |
| Ernie Koob | June 23, 1915 | August 30, 1919 | Pitcher | St. Louis Browns |
| Cal Koonce | April 14, 1962 | August 8, 1971 | Pitcher | Chicago Cubs, New York Mets, Boston Red Sox |
| Graham Koonce | September 20, 2003 | September 28, 2003 | First baseman | Oakland Athletics |
| Harry Koons | April 17, 1884 | July 5, 1884 | Third baseman | Altoona Mountain City, Chicago Browns/Pittsburgh Stogies |
| Jerry Koosman | April 14, 1967 | August 21, 1985 | Pitcher | New York Mets, Minnesota Twins, Chicago White Sox, Philadelphia Phillies |
| George Kopacz | September 18, 1966 | September 29, 1970 | First baseman | Atlanta Braves, Pittsburgh Pirates |
| Larry Kopf | September 2, 1913 | June 16, 1923 | Shortstop | Cleveland Naps, Philadelphia Athletics, Cincinnati Reds, Boston Braves |
| Wally Kopf | October 1, 1921 | October 2, 1921 | Third baseman | New York Giants |
| Howie Koplitz | September 8, 1961 | April 24, 1966 | Pitcher | Detroit Tigers, Washington Senators (1961–71) |
| Mike Koplove | September 6, 2001 | September 26, 2007 | Pitcher | Arizona Diamondbacks, Cleveland Indians |
| Merlin Kopp | August 2, 1915 | September 29, 1919 | Outfielder | Washington Senators, Philadelphia Athletics |
| Joe Koppe | August 9, 1958 | September 11, 1965 | Shortstop | Milwaukee Braves, Philadelphia Athletics, Los Angeles/California Angels |
| George Kopshaw | August 4, 1923 | August 5, 1923 | Catcher | St. Louis Cardinals |
| Steve Korcheck | September 6, 1954 | September 27, 1959 | Catcher | Washington Senators |
| Bobby Korecky | April 26, 2008 | | Pitcher | Minnesota Twins, Arizona Diamondbacks |
| Art Kores | July 24, 1915 | October 3, 1915 | Third baseman | St. Louis Terriers |
| George Korince | September 10, 1966 | May 27, 1967 | Pitcher | Detroit Tigers |
| John Koronka | June 1, 2005 | | Pitcher | Chicago Cubs, Texas Rangers, Florida Marlins |
| Jim Korwan | April 24, 1894 | July 17, 1897 | Pitcher | Brooklyn Grooms, Chicago Colts |
| Andy Kosco | August 13, 1965 | July 30, 1974 | Outfielder | Minnesota Twins, New York Yankees, Los Angeles Dodgers, Milwaukee Brewers, California Angels, Boston Red Sox, Cincinnati Reds |
| Joe Koshansky | September 1, 2007 | September 27, 2008 | First baseman | Colorado Rockies |
| Clem Koshorek | April 15, 1952 | April 14, 1953 | Utility infielder | Pittsburgh Pirates |
| Bill Koski | April 28, 1951 | September 22, 1951 | Pitcher | Pittsburgh Pirates |
| Corey Koskie | September 9, 1998 | July 5, 2006 | Third baseman | Minnesota Twins, Toronto Blue Jays, Milwaukee Brewers |
| Dave Koslo | September 12, 1941 | April 14, 1955 | Pitcher | New York Giants, Baltimore Orioles, Milwaukee Braves |
| Kevin Koslofski | June 28, 1992 | July 7, 1996 | Outfielder | Kansas City Royals, Milwaukee Brewers |
| Mike Kosman | April 20, 1944 | April 20, 1944 | Pinch runner | Cincinnati Reds |
| Joe Kostal | July 14, 1896 | July 17, 1896 | Pitcher | Louisville Colonels |
| Fred Koster | April 27, 1931 | September 27, 1931 | Outfielder | Philadelphia Phillies |
| Frank Kostro | September 2, 1962 | September 21, 1969 | Utility player | Detroit Tigers, Los Angeles Angels, Minnesota Twins |
| Casey Kotchman | May 9, 2004 | | First baseman | Anaheim Angels/Los Angeles Angels of Anaheim, Atlanta Braves, Boston Red Sox, Seattle Mariners, Tampa Bay Rays |
| Mark Kotsay | July 11, 1997 | | Outfielder | Florida Marlins, San Diego Padres, Oakland Athletics, Atlanta Braves, Boston Red Sox, Chicago White Sox, Milwaukee Brewers |
| George Kottaras | September 13, 2008 | | Catcher | Bostom Red Sox, Milwaukee Brewers |
| Sandy Koufax β | June 24, 1955 | October 2, 1966 | Pitcher | Brooklyn/Los Angeles Dodgers |
| Joe Koukalik | September 1, 1904 | September 1, 1904 | Pitcher | Brooklyn Superbas |
| Lou Koupal | April 17, 1925 | September 26, 1937 | Pitcher | Pittsburgh Pirates, Brooklyn Robins, Philadelphia Phillies, St. Louis Browns |
| Kevin Kouzmanoff | September 2, 2006 | | Third baseman | Cleveland Indians, San Diego Padres, Oakland Athletics, Colorado Rockies |
| Fabian Kowalik | September 4, 1932 | September 27, 1936 | Pitcher | Chicago White Sox, Chicago Cubs, Philadelphia Phillies, Boston Bees |
| Brian Kowitz | June 4, 1995 | June 16, 1995 | Outfielder | Atlanta Braves |
| Ernie Koy | April 19, 1938 | September 27, 1942 | Outfielder | Brooklyn Dodgers, St. Louis Cardinals, Cincinnati Reds, Philadelphia Phillies |
| Al Kozar | April 19, 1948 | July 2, 1950 | Second baseman | Washington Senators, Chicago White Sox |
| Ben Kozlowski | September 19, 2002 | September 28, 2002 | Pitcher | Texas Rangers |
| Pete Kozma | May 18, 2011 | | Second baseman | St. Louis Cardinals |
| Joe Kracher | September 17, 1939 | September 30, 1939 | Catcher | Philadelphia Phillies |
| Joe Kraemer | August 22, 1989 | June 25, 1990 | Pitcher | Chicago Cubs |
| Clarence Kraft | May 1, 1914 | May 15, 1914 | First baseman | Boston Braves |
| Joe Krakauskas | September 9, 1937 | September 18, 1946 | Pitcher | Washington Senators, Cleveland Indians |
| Jack Kralick | April 15, 1959 | April 23, 1967 | Pitcher | Washington Senators/Minnesota Twins, Cleveland Indians |
| Steve Kraly | August 9, 1953 | September 15, 1953 | Pitcher | New York Yankees |
| Jack Kramer | April 25, 1939 | August 22, 1951 | Pitcher | St. Louis Browns, Boston Red Sox, New York Giants, New York Yankees |
| Randy Kramer | September 11, 1988 | June 23, 1992 | Pitcher | Pittsburgh Pirates, Chicago Cubs, Seattle Mariners |
| Tom Kramer | September 12, 1991 | September 21, 1993 | Pitcher | Cleveland Indians |
| Ed Kranepool | September 22, 1962 | September 30, 1979 | First baseman | New York Mets |
| Gene Krapp | April 14, 1911 | September 30, 1915 | Pitcher | Cleveland Naps, Buffalo Blues |
| Erik Kratz | July 17, 2010 | | Catcher | Pittsburgh Pirates, Philadelphia Phillies |
| Jack Kraus | April 25, 1943 | September 11, 1946 | Pitcher | Philadelphia Phillies, New York Giants |
| Charlie Krause | July 27, 1901 | July 27, 1901 | Second baseman | Cincinnati Reds |
| Harry Krause | April 20, 1908 | July 28, 1912 | Pitcher | Philadelphia Athletics, Cleveland Indians |
| Lew Krausse Sr. | June 11, 1931 | September 2, 1932 | Pitcher | Philadelphia Athletics |
| Lew Krausse Jr. | June 16, 1961 | September 23, 1974 | Pitcher | Kansas City/Oakland Athletics, Milwaukee Brewers, Boston Red Sox, St. Louis Cardinals, Atlanta Braves |
| Ken Kravec | September 4, 1975 | October 3, 1982 | Pitcher | Chicago White Sox, Chicago Cubs |
| Danny Kravitz | April 17, 1956 | September 18, 1960 | Catcher | Pittsburgh Pirates, Kansas City Athletics |
| Ray Krawczyk | June 29, 1984 | April 28, 1989 | Pitcher | Pittsburgh Pirates, California Angels, Milwaukee Brewers |
| Frank Kreeger | July 28, 1884 | July 28, 1884 | Utility player | Kansas City Cowboys (UA) |
| Mike Kreevich | September 7, 1931 | September 23, 1945 | Outfielder | Chicago Cubs, Chicago White Sox, Philadelphia Athletics, St. Louis Browns, Washington Senators |
| Charlie Krehmeyer | July 8, 1884 | July 19, 1885 | Utility player | St. Louis Browns (AA), Louisville Colonels, St. Louis Maroons |
| Mickey Kreitner | September 28, 1943 | August 17, 1944 | Catcher | Chicago Cubs |
| Ralph Kreitz | August 1, 1911 | October 8, 1911 | Catcher | Chicago White Sox |
| Ray Kremer | April 18, 1924 | July 1, 1933 | Pitcher | Pittsburgh Pirates |
| Jimmy Kremers | June 5, 1990 | October 3, 1990 | Catcher | Atlanta Braves |
| Jim Kremmel | July 4, 1973 | September 25, 1974 | Pitcher | Texas Rangers, Chicago Cubs |
| Wayne Krenchicki | June 15, 1979 | September 22, 1986 | Third baseman | Baltimore Orioles, Cincinnati Reds, Detroit Tigers, Montreal Expos |
| Chuck Kress | April 16, 1947 | July 8, 1954 | First baseman | Cincinnati Reds, Chicago White Sox, Detroit Tigers, Brooklyn Dodgers |
| Red Kress | September 24, 1927 | July 17, 1946 | Shortstop | St. Louis Browns, Chicago White Sox, Washington Senators, Detroit Tigers, New York Giants |
| Lou Kretlow | September 26, 1946 | September 23, 1956 | Pitcher | Detroit Tigers, St. Louis Browns, Chicago White Sox, Baltimore Orioles, Kansas City Athletics |
| Rick Kreuger | September 6, 1975 | May 7, 1978 | Pitcher | Boston Red Sox, Cleveland Indians |
| Chad Kreuter | September 14, 1988 | April 27, 2003 | Catcher | Texas Rangers, Detroit Tigers, Seattle Mariners, Chicago White Sox, Anaheim Angels, Kansas City Royals, Los Angeles Dodgers |
| Frank Kreutzer | September 20, 1962 | May 12, 1969 | Pitcher | Chicago White Sox, Washington Senators (1961–71) |
| Paul Krichell | May 12, 1911 | September 22, 1912 | Catcher | St. Louis Browns |
| Bill Krieg | April 20, 1884 | June 15, 1887 | Utility player | Chicago Browns/Pittsburgh Stogies, Chicago White Stockings, Brooklyn Grays, Washington Nationals (1886–1889) |
| Kurt Krieger | April 21, 1949 | September 11, 1951 | Pitcher | St. Louis Cardinals |
| Howie Krist | September 12, 1937 | September 7, 1946 | Pitcher | St. Louis Cardinals |
| Rick Krivda | July 7, 1995 | September 8, 1998 | Pitcher | Baltimore Orioles, Cleveland Indians, Cincinnati Reds |
| Gus Krock | April 24, 1888 | July 26, 1890 | Pitcher | Chicago White Stockings, Indianapolis Hoosiers (NL), Washington Nationals (1886–1889), Buffalo Bisons (PL) |
| Josh Kroeger | September 2, 2004 | October 2, 2004 | Outfielder | Arizona Diamondbacks |
| Zach Kroenke | September 10, 2010 | | Pitcher | Arizona Diamondbacks |
| Rube Kroh | September 30, 1906 | August 22, 1912 | Pitcher | Boston Americans, Chicago Cubs, Boston Braves |
| Gary Kroll | July 26, 1964 | July 12, 1969 | Pitcher | Philadelphia Phillies, New York Mets, Houston Astros, Cleveland Indians |
| John Kroner | September 29, 1935 | September 29, 1938 | Second baseman | Boston Red Sox, Cleveland Indians |
| Marc Kroon | July 7, 1995 | June 29, 2004 | Pitcher | San Diego Padres, Cincinnati Reds, Colorado Rockies |
| Mike Krsnich | April 23, 1960 | May 19, 1962 | Outfielder | Milwaukee Braves |
| Rocky Krsnich | September 13, 1949 | September 26, 1953 | Third baseman | Chicago White Sox |
| Bill Krueger | April 10, 1983 | August 13, 1995 | Pitcher | Oakland Athletics, Los Angeles Dodgers, Milwaukee Brewers, Seattle Mariners, Minnesota Twins, Montreal Expos, Detroit Tigers, San Diego Padres |
| Ernie Krueger | August 4, 1913 | October 4, 1925 | Catcher | Cleveland Indians, New York Yankees, New York Giants, Brooklyn Robins, Cincinnati Reds |
| Otto Krueger | September 16, 1899 | September 22, 1905 | Utility infielder | Cleveland Spiders, St. Louis Cardinals, Pittsburgh Pirates, Philadelphia Phillies |
| Chris Krug | May 30, 1965 | May 13, 1969 | Catcher | Chicago Cubs, San Diego Padres |
| Gene Krug | April 29, 1981 | May 14, 1981 | Pinch hitter | Chicago Cubs |
| Henry Krug | July 26, 1902 | September 30, 1902 | Utility player | Philadelphia Phillies |
| Marty Krug | May 29, 1912 | September 27, 1922 | Third baseman | Boston Red Sox, Chicago Cubs |
| Abe Kruger | October 6, 1908 | October 7, 1908 | Pitcher | Brooklyn Superbas |
| Art Kruger | April 11, 1907 | September 26, 1915 | Outfielder | Cincinnati Reds, Cleveland Naps, Boston Doves, Kansas City Packers |
| John Kruk | April 7, 1986 | July 30, 1995 | First baseman | San Diego Padres, Philadelphia Phillies, Chicago White Sox |
| Mike Krukow | September 6, 1976 | June 4, 1989 | Pitcher | Chicago Cubs, Philadelphia Phillies, San Francisco Giants |
| Al Krumm | May 17, 1889 | May 17, 1889 | Pitcher | Pittsburgh Pirates |
| Dick Kryhoski | April 19, 1949 | June 10, 1955 | First baseman | New York Yankees, Detroit Tigers, St. Louis Browns/Baltimore Orioles, Kansas City Athletics |
| Dave Krynzel | September 1, 2004 | June 10, 2005 | Outfielder | Milwaukee Brewers |
| Tony Kubek | April 20, 1957 | October 3, 1965 | Shortstop | New York Yankees |
| Jason Kubel | August 31, 2004 | | Outfielder | Minnesota Twins |
| Jeff Kubenka | September 6, 1998 | August 8, 1999 | Pitcher | Los Angeles Dodgers |
| Ted Kubiak | April 14, 1967 | September 28, 1976 | Second baseman | Kansas City/Oakland Athletics, Milwaukee Brewers, St. Louis Cardinals, Texas Rangers, San Diego Padres |
| Tim Kubinski | July 16, 1997 | October 2, 1999 | Pitcher | Oakland Athletics |
| Jack Kubiszyn | April 23, 1961 | September 30, 1962 | Shortstop | Cleveland Indians |
| Gil Kubski | September 2, 1980 | October 5, 1980 | Outfielder | California Angels |
| Johnny Kucab | September 14, 1950 | September 1, 1952 | Pitcher | Philadelphia Athletics |
| Jack Kucek | August 8, 1974 | October 1, 1980 | Pitcher | Chicago White Sox, Philadelphia Phillies, Toronto Blue Jays |
| Johnny Kucks | April 17, 1955 | September 25, 1960 | Pitcher | New York Yankees, Kansas City Athletics |
| Steve Kuczek | September 29, 1949 | September 29, 1949 | Pinch hitter | Boston Braves |
| Bert Kuczynski | June 2, 1943 | July 4, 1943 | Pitcher | Philadelphia Athletics |
| Bill Kuehne | May 1, 1883 | September 29, 1892 | Third baseman | Columbus Buckeyes (AA), Pittsburgh Alleghenys, Pittsburgh Burghers, Columbus Solons, Louisville Colonels, St. Louis Browns (NL), Cincinnati Reds |
| Harvey Kuenn | September 6, 1952 | October 2, 1966 | Utility player | Detroit Tigers, Cleveland Indians, San Francisco Giants, Chicago Cubs, Philadelphia Phillies |
| Fred Kuhaulua | August 2, 1977 | October 1, 1981 | Pitcher | California Angels, San Diego Padres |
| Joe Kuhel | July 31, 1930 | May 11, 1947 | First baseman | Washington Senators, Chicago White Sox |
| Bub Kuhn | September 1, 1924 | September 1, 1924 | Pitcher | Cleveland Indians |
| Kenny Kuhn | July 7, 1955 | September 29, 1957 | Shortstop | Cleveland Indians |
| Walt Kuhn | April 18, 1912 | September 28, 1914 | Catcher | Chicago White Sox |
| Charlie Kuhns | June 4, 1897 | October 14, 1899 | Utility infielder | Pittsburgh Pirates, Boston Braves |
| Duane Kuiper | September 9, 1974 | June 27, 1985 | Second baseman | Cleveland Indians, San Francisco Giants |
| John Kull | October 2, 1909 | October 2, 1909 | Pitcher | Philadelphia Athletics |
| Mike Kume | August 26, 1955 | September 25, 1955 | Pitcher | Kansas City Athletics |
| Bill Kunkel | April 15, 1961 | September 21, 1963 | Pitcher | Kansas City Athletics, New York Yankees |
| Jeff Kunkel | July 23, 1984 | September 14, 1992 | Shortstop | Texas Rangers, Chicago Cubs |
| Rusty Kuntz | September 1, 1979 | April 24, 1985 | Outfielder | Chicago White Sox, Minnesota Twins, Detroit Tigers |
| Earl Kunz | April 19, 1923 | July 30, 1923 | Pitcher | Pittsburgh Pirates |
| Eddie Kunz | August 3, 2008 | August 16, 2008 | Pitcher | New York Mets |
| Hong-Chih Kuo | September 2, 2005 | | Pitcher | Los Angeles Dodgers |
| Hiroki Kuroda | April 4, 2008 | | Pitcher | Los Angeles Dodgers |
| Ryan Kurosaki | May 20, 1975 | June 16, 1975 | Pitcher | St. Louis Cardinals |
| Whitey Kurowski | September 23, 1941 | October 1, 1949 | Third baseman | St. Louis Cardinals |
| Hal Kurtz | April 18, 1968 | August 12, 1968 | Pitcher | Cleveland Indians |
| Ed Kusel | September 18, 1909 | October 1, 1909 | Pitcher | St. Louis Browns |
| Emil Kush | September 21, 1941 | August 3, 1949 | Pitcher | Chicago Cubs |
| Craig Kusick | September 8, 1973 | September 30, 1979 | First baseman | Minnesota Twins, Toronto Blue Jays |
| Art Kusnyer | September 21, 1970 | October 1, 1978 | Catcher | Chicago White Sox, California Angels, Milwaukee Brewers, Kansas City Royals |
| Jul Kustus | April 17, 1909 | July 10, 1909 | Outfielder | Brooklyn Superbas |
| Randy Kutcher | June 19, 1986 | September 27, 1990 | Outfielder | San Francisco Giants, Boston Red Sox |
| Joe Kutina | September 6, 1911 | September 13, 1912 | First baseman | St. Louis Browns |
| Marty Kutyna | September 19, 1959 | September 22, 1962 | Pitcher | Kansas City Athletics, Washington Senators (1961–71) |
| Jerry Kutzler | April 28, 1990 | May 31, 1990 | Pitcher | Chicago White Sox |
| Masumi Kuwata | June 10, 2007 | August 13, 2007 | Pitcher | Pittsburgh Pirates |
| Bob Kuzava | September 21, 1946 | September 29, 1957 | Pitcher | Cleveland Indians, Chicago White Sox, Washington Senators, New York Yankees, Baltimore Orioles, Philadelphia Phillies, Pittsburgh Pirates, St. Louis Cardinals |
| Al Kvasnak | April 15, 1942 | May 3, 1942 | Outfielder | Washington Senators |
| Andy Kyle | September 7, 1912 | October 6, 1912 | Outfielder | Cincinnati Reds |
