Curley Culp was a defensive lineman who helped turn the Oilers around after joining the team in 1974.
Culp was a key member of the Oilers when Bum Phillips was coach.
The 75-year-old played 14 NFL seasons, and was a six-time Pro Bowler.
He posted about his diagnosis on Twitter, and asked his followers to "donate to your local cancer organizations so this dreaded disease is eradicated."
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