On June 20, 2007, Sammy Sosa slugged his 600th home run in the Rangers’ 7-3 victory over the Chicago Cubs at Rangers Ballpark in Arlington. Sosa had homered against every team except the Cubs, for whom he played much of his career. The homer came off Jason Marquis, who was wearing #21 – the number Sosa had worn for the Cubs.
September 4, 1991
Atlanta Braves the first team in history to have three players with 40 or more home runs in one season
September 29, 1973
July 29, 1969
April 14, 1955