sentence: cities/teams/years championship teams 1915 frederick hustlers 1916 chambersburg maroons 1917 hagerstown terriers 1918 cumberland colts 1919 season suspended 1920 hagerstown champs 1921 frederick hustlers 1922 martinsburg blue sox 1923 martinsburg blue sox 1924 martinsburg blue sox 1925 hagerstown hubs 1926 hagerstown hubs 1927 chambersburg maroons 1928 hanover raiders 1929 hagerstown hubs 1930 chambersburg young yanks hall of fame alumni three future hall of famers took their first steps in the league : pitcher lefty grove ( martinsburg , 1920 ) , outfielder hack wilson ( martinsburg , 1921 - ' 22 ) and umpire bill mcgowan ( 1917 ) .