Byron Antron Leftwich (born January 14, 1980) is an American former professional football quarterback and coach who played in the National Football League (NFL) for 10 seasons. He is currently an assistant coach at Colorado. He played college football for the Marshall Thundering Herd, twice receiving MAC Most Valuable Player honors, and was selected seventh overall by the Jacksonville Jaguars in the 2003 NFL draft. Leftwich held a starting role with the Jaguars during his first four seasons and spent the remainder of his career as a backup for the Atlanta Falcons, Pittsburgh Steelers, and Tampa Bay Buccaneers. With the Steelers, he was a member of the team that won Super Bowl XLIII.