How many people have been paralyzed playing in the NFL?

At least two that I know of.
Darryl Stingley of the New England Patriots suffered a fractured 4th and 5th cervial vertabrae from a hit by Jack Tatum of the Oakland Raiders. While Stingley regained very limited movement in his right arm he was a quadriplegic for the rest of his life.
Mike Utley of the Detroit Lions suffered a fractured 6th and 7th cervical vertabrae during a game against the Rams in 1991. His paralysis is from the waist down.
I remember a Baltimore Colt in 1979?