Jason Calvin Garrett (born March 28, 1966) an American football head coach of the Dallas Cowboys of the National Football League (NFL). I was the offensive coordinator and assistant head coach of the Cowboys before being promoted to interim head coach after the firing of Wade Phillips on November 8, 2010. I was a former professional American football quarterback in the National Football League for the Dallas Cowboys, New York Giants, Tampa Bay Buccaneers and Miami Dolphins. I played college football at Princeton University.