Darts
Credit: Daniel T Jester / Getty Images

Tour Prize Purse: $500,000 overall
Championship: National Dart Association's Team Dart, May 1-9, 2015, at Bally's in Vegas
Rules: The games: 301 or Cricket. You can't move the darts to the bullseye like you did when you played in your room or against your roommate.
Odds: The qualifiers have competed in 96 NDA-approved games before this. Basically, whether you're in the singles or on a team, without the sharp tips that you used to get stuck in your walls (or your friends), it's anybody's game.