Ken Stabler, a precision passer who was famously cool under pressure in becoming one of pro football’s leading quarterbacks of the 1970s and engineering the Oakland Raiders’ first Super Bowl victory, died on Wednesday in Gulfport, Miss. He was 69.

The cause was colon cancer, which had been diagnosed in February, his family said. The family said his brain and spinal cord were donated to a Boston University center that conducts research into degenerative brain disease among athletes.

One of football’s uncommon left-handed quarterbacks, Stabler was named to the National Football League’s all-decade team for the 1970s and was a four-time Pro Bowl selection, though he missed out on entering the Pro Football Hall of Fame.

“I’ve often said, if I had one drive to win a game to this day, and I had a quarterback to pick, I would pick Kenny,” John Madden, Stabler’s coach with the Raiders, said in a statement upon his death. “When you think about the Raiders, you think about Ken Stabler.”