The Major League Baseball Most Valuable Player Award has never been presented to a member of at least four teams.
 Baseball's original steroid testing policy, in effect from 2002 to 2005, provided for penalties ranging from a ten-game suspension for a first positive test to a one-year suspension for a fourth positive test
 In early 1997, MLB decided to assign one new team to each league: Tampa Bay joined the AL and Arizona joined the NL

