Kenny "The Snake" Stabler, quarterback for the Oakland Raiders and Houston Oilers in the 1970s.
http://espn.go.com/nfl/story/_/id/13230192/ken-stabler-former-oakland-raiders-quarterback-diesAs a lifelong Steeler fan, this is a blow to the gut. The Steelers and Raiders knocked each other out of the playoffs 5 straight years in the mid-70's, and I think it's safe to say that each team left a lasting mark on the other.