- Born: Oct. 1, 1963, in Pomona, Calif.
- Teams: Oakland Athletics (1986–97), St. Louis Cardinals (1997–2001)
- Height: 6-5
- Weight: 225
- Batted: Right
- Threw: Right
- College: Southern California
- Primary position: First base
1981: Is drafted by the Montreal Expos in the eighth round. Opts to attend USC instead.
1984: Hits 33 home runs and drives in 77 runs in 63 games for the Trojans. Represents the U.S. on the first baseball Olympic team, along with future big-league stars Barry Larkin and Will Clark.
1984: Selected 10th overall in the draft by the Oakland A's.
1985: Hits 24 homers and drives in 106 runs in 138 games for Class A Modesto.
1987: As an A's rookie, hits 33 homers before the All-Star break and is a unanimous choice for AL Rookie of the Year. Finishes with 49 homers (an MLB rookie record), 118 RBI and a .289 average.
1989: McGwire first uses steroids, according to his 2010 confession.
1990: McGwire wins his only Gold Glove.
1991: Makes the AL All-Star team, but slumps to .201 and 22 HRs in 154 games. Manager Tony La Russa sits him the last two games so his average doesn't fall below .200.
1992: Bounces back with 42 HRs and a .292 average.
1993: Foot injury limits him to 27 games. Begins to use steroids again to help him get over the injury.
1994: Plays in 47 games, hitting nine HRs.
1995: Career renaissance begins, hitting 39 HRs in 317 at-bats.
1996: Hits MLB-leading 52 homers in 423 at-bats and a career-high .312.
1997: Is dealt at the trade deadline to the St. Louis Cardinals. Finishes with career-best 58 HRs.
1998: Signs extension with Cardinals for fourth-largest contract in baseball that year ($8.9 million). Breaks then-MLB record with 70 homers in historic duel with Cubs' Sammy Sosa, who finishes with 66. AP writer Steve Wilstein notices a bottle of androstenedione, an over-the-counter muscle-enhancement product, in McGwire's locker during an interview. McGwire admits to using it (it was not banned at the time).
1999: Hits 65 HRs and drives in 147 for the Cardinals.
2000: Nagging injuries take toll - he plays in 89 games, yet still hits 32 homers.
2001: Hits 29 homers in 299 at-bats in his final season at age 37. Finishes with 583 career homers, then fifth on all-time list.
Feb. 2005: Accused of using steroids in "Juiced", a book by former Oakland teammate Jose Canseco. Issues denial that he'd ever used steroids.
March 2005: Appears before House committee investigating steroids in baseball. Famously says, "I'm not here to talk about the past," upon the advice of attorneys.
2007: First eligible for Hall of Fame, and receives only 23.5 percent of the vote by writers.
Nov. 2009: Hired as hitting coach by Cardinals.
Jan. 2010: Admits he used steroids.