TODAY IN HISTORY | 08-15: Mark McGwire 1st to hit 30 HRs in each of his 1st four seasons
DENVER, CO - SEPTEMBER 18: Mark McGwire #25 of the San Diego Padres stands in the dugout during a regular season MLB game between the Colorado Rockies and the visiting San Diego Padres at Coors Field on September 18, 2016 in Denver, Colorado. (Photo by Russell Lansford/Getty Images)Photo by: Russell Lansford
TODAY IN HISTORY | 08-15: Mark McGwire 1st to hit 30 HRs in each of his 1st four seasons
MARCH 1992: Mark McGwire of the Oakland Athletics looks on during a Spring Training game against the Seattle Mariners in March 1992. (Photo by Otto Greule Jr/Getty Images)Photo by: Otto Greule Jr
TODAY IN HISTORY | 08-15: Mark McGwire 1st to hit 30 HRs in each of his 1st four seasons
ANAHEIM, CA - JUNE 29: Mark McGwire #25 of the Oakland Athletics looks on during the game against the California Angels at Anaheim Stadium on June 29, 1996 in Anaheim, California. (Photo by J.D. Cuban/Getty Images)Photo by: J.D. Cuban
TODAY IN HISTORY | 08-15: Mark McGwire 1st to hit 30 HRs in each of his 1st four seasons
29 Jun 2001: Barry Bonds of the San Francisco Giants talks with Mark McGwire of the St. Louis Cardinals at Pac Bell Park in San Francisco, California. <DIGITAL IMAGE> Mandatory Credit: Jed Jacobsohn/ALLSPORTPhoto by: Jed Jacobsohn
TODAY IN HISTORY | 08-15: Mark McGwire 1st to hit 30 HRs in each of his 1st four seasons
10 Sep 1997: Mark McGwire of the St. Louis Cardinals swings at the ball during a game against the San Francisco Giants at 3Com Park in San Francisco, California. The Giants won the game, 7-6. Mandatory Credit: Otto Greule /AllsportPhoto by: Otto Greule Jr
TODAY IN HISTORY | 08-15: Mark McGwire 1st to hit 30 HRs in each of his 1st four seasons
7 Jul 1998: American Leaguer player Mark McGwire #25 of the St Louis Cardinals and Sammy Sosa #21 of the Chicago Cubs answer questions during the Major League Baseball All-Star Game at Coors Field in Denver, Colorado.The American League defeated thePhoto by: Jed Jacobsohn
TODAY IN HISTORY | 08-15: Mark McGwire 1st to hit 30 HRs in each of his 1st four seasons
23 Sep 1998: (FILE PHOTO) Mark McGwire #25 of the St. Louis Cardinals hits the ball during the game against the Houston Astros at Busch Stadium in St. Louis, Missouri. According to reports January 11, 2010, McGwire has admitted to steroid use during while playing Major League baseball and when he broke the home run record. (Photo by Jonathan Daniel/Getty Images)Photo by: Jonathan Daniel
TODAY IN HISTORY | 08-15: Mark McGwire 1st to hit 30 HRs in each of his 1st four seasons
CHICAGO - JULY 1990: (L-R) Cecil Fielder #45 of the Detroit Tigers, Jose Canseco #33 and Mark McGuire #25 of the Oakland Athletics look on during batting practice prior to the1990 All-Star Game at Wrigley Field circa July 1990 in Chicago, Illinois. (Photo by Steve Goldstein/Getty Images)Photo by: Getty Images
TODAY IN HISTORY | 08-15: Mark McGwire 1st to hit 30 HRs in each of his 1st four seasons
DENVER - JULY 6: Ken Griffey Jr. and Mark McGwire display trophies for getting the most votes in all-star balloting prior to the 69th MLB All-Star Game at Coors Field on July 6, 1998 in Denver, Colorado. (Photo by Jed Jacobsohn/Getty Images)Photo by: Jed Jacobsohn
TODAY IN HISTORY | 08-15: Mark McGwire 1st to hit 30 HRs in each of his 1st four seasons
27 Sep 1998: Mark McGwire #25 of the St. Louis Cardinals hits his 70th home run of the season as catcher Michael Barrett #5 of the Montreal Expos and umpire Rich Rieker watch during a game at the Busch Stadium in St. Louis, Missouri. The Cardinals defeatPhoto by: Doug Pensinger
TODAY IN HISTORY | 08-15: Mark McGwire 1st to hit 30 HRs in each of his 1st four seasons
OAKLAND, CA - 1988: Mark McGwire #25 of the Oakland Athletics plays first base during a game in the 1988 season at Oakland-Alameda County Coliseum in Oakland, California. (Photo by Otto Greule Jr/Getty Images)Photo by: Otto Greule Jr