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 American League history a few months after Jackie Robinson debuted for the Dodgers in the National League