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
2 / 15
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.

Upload Photos / Videos