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Older athletes who put you to shame

Published On: Sep 03 2013 10:19:53 AM CDT

Diana Nyad is among the older athletes running marathons, scaling mountains and otherwise putting the rest of us to shame.

Old Athletes - Herschel Walker
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Courtesy of Strikeforce

Herschel Walker (51) -- An 11-year stint in the NFL apparently wasn't enough for Walker, who's now a mixed martial arts fighter at age 51. In his MMA debut in 2010, he defeated Greg Navy via technical knock-out.

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