In what will likely be the most significant retirement of the off-season, Joe Thomas of the Cleveland Browns has announced that he will no longer compete in the National Football League. On his ThomaHawk podcast, Thomas cited his recent knee injury as the main reason for his retirement. Drafted third overall out of the University of Wisconsin in 2007, Thomas proved to be one of the most durable players in league history. Since he was drafted, the Left Tackle played 10,363 consecutive snaps until a tricep injury forced him out on October 22 of this past season. This is (unofficially)…