strut888- You'll like this one. The Golden Nugget one year in their Kentucky Derby future book was accepting wagers on a horse that was dead.
A couple years ago Leroy's, a real dogshit operation that has a bunch of satellite books here in many of the hotels, put up 4 teams in the NHL at 10,000-1 each to win the Stanley Cup. The only problem was that all 4 teams had been mathematically eliminated from the playoffs.