Hall of Famer Harmon Killebrew warms up in the on-deck circle. Killebrew played for the Twins from 1961 to 1974.
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Killebrew, then with the Senators, poses with the Yankees' Bill Skowron and Casey Stengal. Killebrew led the majors with 42 home runs during the season.
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Hammerin' Harmon fouls off a pitch during the first inning of a game with the Yankees. The Twins fell 6-0 on the day, which wasn't a big surprise -- Minnesota, in its inaugural season, finished 70-90, while New York won a league-best 109 games and took the World Series title.
4 of 10Neil Leifer/SI
No. 3 takes a cut. Minnesota retired his number in 1975. He was the first Twins player to receive this honor.
5 of 10Neil Leifer/SI
Killebrew only hit .256 during his career, but thanks to 1,559 walks during his career (15th best all-time), his on-base percentage of .376 was more respectable.
6 of 10Neil Leifer/SI
Killebrew ranks 11th all-time with 573 home runs. He was voted into the Hall of Fame in 1984 in his fourth year on the ballot.
7 of 10Photo File/MLB Photos via Getty Images
Killebrew prepares for a pitch. The Twins slugger led the majors in home runs six times during his career, including with a career-high 49 in 1964 and 1969.
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The power hitter holds up baseballs No. 500 and 501 after becoming the 10th major leaguer to break into the 500-homer club. His 500th came off Baltimore's Mike Cuellar and traveled into the left-field bleachers.
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Then home run king Hank Aaron and Killebrew (then fifth in career homers) sit in the dugout after engaging in a home run hitting contest before an Atlanta-Minnesota exhibition game. Each hit three homers during the contest.
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Killebrew poses with a statue of himself after its unveiling near Target Field in Minneapolis.
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