Former Oakland Raiders cornerback Alonzo “Skip” Thomas died of a heart attack on Sunday. He was 61.

Nicknamed “Dr. Death.” Thomas spent all six years of his NFL career in Silver & Black after being selected by Oakland in the seventh round of the 1972 NFL draft. Thomas, who had 17 interceptions during his career, was a starting cornerback alongside Willie Brown for most of his career. His career was highlighted by a strong performance in the Raiders’ Super Bowl victory over Minnesota in Super Bowl XI in 1977.

Thomas’ death comes almost a year to the day that former defensive backfield teammate Jack Tatum passed away. Tatum died July 27, 2010.