Potatoes!

Apparently, there is a Mashed Potato Wrestling Federation. Their events are held in Barnesville, Minnesota and Clark, South Dakota. In this competition, the wrestlers combat in a giant tub of mashed potatoes. Eric Hanson comments: "After they are all done getting [the mashed potatoes] out of their crevices, it will be fed to cows."
The undefeated reigning world champion Steve-O Gratin justifies the choice of mashed potatoes: "We'd go to Japan, we'd wrestle in sushi. We go to Boston, it's clam chowder."
And lest you think that this sport is not tough, Yukon Golden Boy shares his strategy: "Well I do a little thing called the mashed potato where I pick up a handful, and I pick up another handful, and I put it in the guy's ears, and I shake his head. Generally that works my opponent into submission."Afrodisiac also shares a strategy, - "My Afro prevent[s] all potatoes from actually entering near my scalp.
The competition is also tough. Rowdy Rowdy Potato, who wears a superman outfit, laments: "I'm un-undefeated....I've never won."
"You can never train enough for mashed potato wrestling," warns Steve-O-Gratin.
Many interesting videos of mashed potato wrestling posted on the official MPWF blog.