Former Notre Dame QB Blair Kiel dies aged 50

Former Notre Dame quarterback Blair Kiel, who also served as backup at the Green Bay Packers, died Sunday aged 50.

Kiel was rushed to a Columbus, Ind., hospital from a relative's house, Bartholomew County coroner Allen Smith told the Chicago Tribune.

Smith said doctors performed "advanced life support protocols" by were unable to revive him.

He was pronounced dead at 12:21pm local time, with an autopsy determining Kiel died of natural causes.

A Columbus native, Kiel played for Notre Dame from 1980-83, throwing for 3,650 yards and 17 touchdowns.

He went on to play for the Buccaneers, Colts and Packers over parts of seven NFL seasons, throwing 193 career passes.

Kiel had a number of legal run-ins in recent years. He was arrested in connection with a domestic battery and public intoxication incident in 2009. In 2010, he was arrested for drunk driving.

His nephew Gunner Kiel is now a highly touted freshman quarterback with Notre Dame.