Complex sentence: He started as a utility player, returning punts, but seized the chance in 1980 and became an all star quarterback, throwing for 2892 yards and 19 touchdowns, winning the CFL's Most Outstanding Canadian Award.
Split into simpler sentences: He started as a utility player, returning punts, but seized the chance in 1980. That season became an all star quarterback, throwing for 2892 yards and 19 touchdowns and winning the CFL's Most Outstanding Canadian Award.