Photo: AP
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1982

Before he was a major league star, McGwire spent a summer in the Alaska Summer League playing for the Anchorage Glacier Pilots.



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Photo: Courtesy of USC
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Randy Johnson, Rod Dedeaux and Mark McGwire

1983

McGwire poses with Team USA baseball coach Rod Dedeaux and Randy Johnson.



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Photo: Focus On Sport/Getty Images
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1986

McGwire at 22, when he first broke into the big leagues.



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Photo: Michael Zagaris/Getty Images
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1987

McGwire talks to reporters in the locker room following the 1987 MLB All Star Game.



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Photo: Focus on Sport/Getty Images
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Mark McGwire, Don Mattingly and Matt Nokes

1987

McGwire poses with Don Mattingly and Matt Nokes during the 1987 All-Star Game at Oakland Coliseum.



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Photo: Michael Zagaris/MLB Photos via Getty Images
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1987

McGwire strikes a pose in the A's dugout.



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Photo: Michael Zagaris/Getty Images
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Mark McGwire and Jose Canseco

1989

McGwire and Jose Canseco during spring training in Mesa, Ariz.



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Photo: V.J. Lovero/SI
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Jose Canseco and Mark McGwire

1992

McGwire and Jose Canseco get a good view of the Padres' pitcher during a spring training game against San Diego.



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Photo: Walter Iooss Jr./SI
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1998

McGwire shows off his home-run hitting stroke.



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Photo: V.J. Lovero/SI
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1998

McGwire plays billiards at his home in Huntington Harbour, Calif.



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Photo: Walter Iooss Jr./SI
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1998

McGwire wasn't afraid to look goofy during this 1998 SI photo shoot.



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Photo: Walter Iooss Jr./SI
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Mark McGwire and Sammy Sosa

1998

McGwire and Sammy Sosa share a laugh during this SI photo shoot for the 1998 Sportsman of the Year issue.



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Photo: V.J. Lovero/SI
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1998

McGwire looks out at the Pacific Ocean from his boat, "Four Bases."



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Mark McGwire and Pope John Paul II

1999

McGwire, who was raised Catholic, kisses the ring of Pope John Paul II before a youth rally at the Kiel Center in St. Louis.



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Photo: Tom DiPace/SI
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1999

McGwire rips the cover off the ball in this photo shoot.



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Photo: Walter Iooss Jr./SI
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Fernando Vina, Mark McGwire, Jim Edmonds and Shawon Dunston

2000

Fernando Vina, McGwire, Jim Edmonds and Shawon Dunston posing on the field during an SI photo shoot.



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Mark McGwire and Jason Giambi

2001

Jason Giambi gives his former teammate a bearhug during a news conference before an exhibition game between the A's and Cardinals.



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Photo: Fred Vuich/SI
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2004

McGwire shows off his golf skills during theWestern Amateur in Benton Harbor, Mich.



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Photo: Anthony J Causi/Icon SMI
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Mark and Stephanie McGwire

2005

McGwire and his wife, Stephanie, pose at the 2005 SI Swimsuit party. The two appeared together in the issue.



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Photo: Chris Shipman/SI
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Mark and Stephanie McGwire

2005

McGwire and his wife pose during a photo shoot for the 2005 SI swimsuit issue.



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