1998: Toronto Blue Jays SP Roger Clemens became the 11th pitcher to record 3,000 career strikeouts in MLB history
1998: New York Yankees’ 1-0 victory over the Baltimore Orioles improved their record to 61-20, tying the best 81-game start in MLB history (1902 Pirates, 1907 Cubs)
1993: Oakland Athletics OF Rickey Henderson led off both games of a doubleheader against the Cleveland Indians with a HR, becoming the 1st player to accomplish the feat since 1913. Henderson finished his HOF career with the most leadoff HR (81) to start a game in MLB history
1991: MLB owners unanimously approved of the expansion of Colorado Rockies and Florida Marlins franchises to join the NL in 1993
1989: Pittsburgh Pirates OF Barry Bonds hit his 76th career HR to give him and his father, Bobby, the all-time father-son HR record (408); Barry’s 763 career HRs would have set the record himself, but Bobby’s 332 give the duo a whopping 1,095
1987: Oakland Athletics 1B Mark McGwire became the 1st rookie to hit 30 HRs before the All-Star break in MLB history
1947: Making his debut with the Cleveland Indians at 1B, Larry Doby became the 1st black player in AL history
1934: New York Yankees 1B Lou Gehrig hit his 17th career grand slam in a victory over the Washington Senators, passing Babe Ruth’s total for the all-time record. Gehrig finished with 23 Grand Slams which stood as the record all the way until 2013 when Alex Rodriguez claimed the record with No. 24 en route to 25 career slams