LOS ANGELES (AP) -- Cullen Bryant, who spent 11 seasons with the Los Angeles Rams, was a running back on their 1980 Super Bowl team and fought the NFL's trading rules to remain in town, has died. He was 58.

Unknown to his family, Bryant had been under a doctor's care when he died Tuesday at his home in Colorado Springs, Colo., said his sister-in-law, Wanda E. Bryant. She did not supply other details.

Bryant was the Rams' second-round draft pick in 1973. He played with the team until 1982, was with the Seattle Seahawks in 1983 and 1984 and returned to the Rams for his last pro season in 1987.

In 1975, Bryant went to federal court to challenge the right of then-NFL Commissioner Pete Rozelle to order him off the team. The Rams had signed former Detroit Lions receiver Ron Jessie. Under the "Rozelle Rule" on free agents, the team signing a free agent had to compensate the team that lost the player. If the teams couldn't agree on compensation, the commissioner had the power to award either draft choices or players. He decided Bryant should go to Detroit.

At the behest of Rams owner Carroll Rosenbloom, Bryant went to court in Los Angeles. A judge was unsympathetic to the NFL's position during a hearing, and the league backed off several days later before a ruling could be made.

The Rozelle Rule eventually was modified.