Harmon Killebrew was an American professional baseball first baseman, third baseman, and left fielder. During his 22-year career in Major League Baseball (MLB), primarily with the Minnesota Twins, Killebrew was a prolific power hitter who, at the time of his retirement, was second only to Babe Ruth in American League (AL) home runs and was the AL career leader in home runs by a right-handed batter (since broken by Alex Rodriguez). He was inducted into the National Baseball Hall of Fame in 1984. Harmon Killebrew has hand signed this Official Major League Baseball with 573 HR's inscription. Certificate of Authenticity from Athlon Sports Collectibles. Exact Ball as shown. Minor spot left of "H' as shown, sold as is, no returns.