Even the great ones have off days, as Tom Brady found out against the Bills. Onion Sports lists the worst games of the very best.

• Michael Jordan: Baseball
• Tom Brady: Tried to play through a nasty virus that makes your arm throw a bunch of interceptions
• Arnold Palmer: Took him a whole 284 shots to get his first Masters win
• Warren Moon: Fumbled a record five times in one game, a performance so bad the Houston Oilers don't even exist anymore
• Willis Reed: In biggest game of his life, only scored two baskets, then went ahead and acted like he did something special anyway
• Brett Favre: That playoff game where he threw a game-ending interception
• Muhammad Ali: During the famous Rumble in the Jungle, Ali seemed to let George Foreman beat the living hell out of him for some reason