Seattle Seahawk Richard Sherman got Sports Reporter Padraic Duffy thinking about who holds the titles for the greatest trash talkers in sports history. This can be a touchy subject for some folks ("Just shut up and play" is a familiar refrain) but Duffy appreciates how a well-timed barb can throw an opponent off his or her game. Obviously Muhammad Ali wasn’t just “The Greatest” in the ring. He was the first athlete in the television era that used a microphone to get into somebody’s head and did it better than anyone. Here are Duffy's 12 greatest trash-talking athletes of all time.