J.J. Watt, one of the most dominant defensive players in NFL history, is calling it a career.The Cardinals edge rusher announced his retirement on Dec. 27 on Twitter and Instagram, saying that he's played in his last-ever home game.Koas first ever NFL game.My last ever NFL home game.My heart is filled with nothing but love and gratitude. Its been an absolute honor and a pleasure. JJ Watt...