6 Athletes Who Had A Second Career In Sports
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#1. Herschel Walker | Football, Bob Sledding, Mixed Martial Arts He beat people down on the football field for 12 NFL seasons before retiring in 1997, and in 2010, at age 47, he resumed beating people beat down as a professional MMA fighter. In '92, Walker also competed in the Winter Olympics on the two-man bobsled team, placing seventh.