20. Warren Sapp
Defensive Tackle
Buccaneers, Raiders

Sapp's immense talent was matched by his knack for drawing criticism for his outgoing personality and physical play. He was fined by the league for running through opponents' warm-ups, he's bumped refs, kicked over pylons, berated media members and insulted teammates. On a more serious note, in 2002 Sapp delivered a controversial block that nearly ended Packers offensive lineman Chad Clifton's career.