 In 1977, he was the starter for the Super Bowl XII winning team.His best season came in 1978, although he missed three games with ankle and foot problems, he led the team with 5 interceptions, while still excelling on special teams.In Super Bowl XIII he was involved in one of the most controversial calls in Super Bowl history, when Lynn Swann ran up his back and both fell, resulting in a pass interference that gave the Pittsburgh Steelers the ball deep in Cowboys territory and an eventual crucial touchdown.