Daryle Lamonica, the quarterback known as the Mad Bomber for his powerful arm, died on Thursday at his home in Fresno, Calif. He was 80.

His son Brandon said that he died in his sleep. He said that he did not know the cause, but that his father had not been in ill health.

Lamonica became one of pro football’s leading passers in the late 1960s and early ’70s. But initially, after playing for three seasons with mediocre Notre Dame teams 

The Buffalo Bills selected him in the 24th round of the fledgling American Football League’s 1963 draft, and the Green Bay Packers picked him in the 12th round of the National Football League draft.

Lamonica signed with the Bills, figuring he was more likely to supplant Jack Kemp as their starting quarterback than to take over for the Packers’ Bart Starr.

Playing for the Bills from 1963 to 1966, he could never dislodge Kemp, who led Buffalo to a pair of A.F.L. championships.  

He led the 1967 Raiders to a 13-1 regular-season record and the A.F.L. championship, throwing for 30 touchdowns and 3,228 yards.  

Davis, in turn, adapted a scheme run by Sid Gillman, the San Diego Chargers’ head coach when Davis was one of his assistant coaches in the early 1960s.