There is a real sport called Chess Boxing. Yes, really:

Stripped to the waist, wearing towels around their shoulders and headphones playing the lulling sound of a moving train to drown out the baying crowd, the men played for four minutes.
Then off came their reading glasses and on went the gloves and the mouthguards.

The game can end in a checkmate or knockout, this is great. I’d rather watch this then UFC. Now just think of your favorite boxers and chess players. The two don’t fit.

What other good sports mashups would work? Baseball Poker? How about Soccer Monopoly? Hockey Pai-Gow?