Duane Thomas, the former running back for the Dallas Cowboys and a key player in their first Super Bowl victory in 1971, has died at the age of 77. He was known for his tumultuous relationship with the team, marked by a contract dispute that led to his trade to New England, which was later voided. Thomas was a standout player, leading the Cowboys in both rushing yards and touchdowns during his tenure, and famously scored the first touchdown at Texas Stadium. Despite his on-field success, he was often uncommunicative with the media and held grudges against team management. His career statistics include 2,038 rushing yards and 21 touchdowns, with a significant contribution of 1,596 yards and 16 touchdowns during his time with the Cowboys. As of now, the cause of death has not been disclosed.