It's that time of year when you start looking for that perfect sports Halloween costume that'll guarantee free beers throughout the night. Two years ago Tiger Woods was money. Last year saw a rush of Tebow-themed costumes. There was the Kenny Powers era. The Barry Bonds/McGwire era. What will 2011 bring? We expect many more Macho Man Savage (remember, he died) and of course Al Davis costumes. Here are the best of the best over the past few years. JUMP!