Well, we might not agree with Sports Illustrated as to just who should be considered an "athlete," but so be it.
They've listed their picks for the 25 TOUGHEST ATHLETES.
Here's #25:

Joey Chestnut
What makes him tough: Intestinal fortitude of the highest order. Aptly nicknamed "Jaws", this dynamo of competitive eating last year ingested -- among other things -- 8.6 pounds of asparagus in 10 minutes, 182 chicken wings in half an hour, 47 grilled cheese sandwiches in 10 minutes, and 103 Krystal hamburgers in eight minutes, living to tell each time.
Defining moment: Ending Kobayashi's six-year hold on the Nathan's Famous Hot Dog Eating Contest at Coney Island last year. Only one month after setting a world record of 59 ½ tubes of beef, sodium, fat and nitrates in 12 minutes, Chestnut inhaled 66 in the same span without reviewing any of them.
Old school match: Babe Ruth, who was renowned for gargantuan appetites that moved a teammate to say, "If you cut that fat slob open, half the concessions at Yankee Stadium would come pouring out."
Find out the rest of Sports Illustrateds 25 Toughest Athletes on SI.com ç here