Hall of Fame defensive back Jimmy Johnson of the San Francisco 49ers in a 14 to 37 loss to the Los Angeles Rams on October 20, 1974 at the Los Angeles Memorial Colesium in Los Angeles, California. (National Football League)

Former San Francisco 49ers quarterback Steve Young, center, stands on stage with former 49ers coach Bill Walsh, left, and former 49ers cornerback Jimmy Johnson during a halftime ceremony honoring Young's induction into the Pro Football Hall of Fame as the 49ers played the Seattle Seahawks in San Francisco on Sunday, Nov. 20, 2005. The Seahawks won 27-25. (AP Photo/Jeff Chiu)

Jimmy Johnson (37), CB San Francisco 49ers in 1973. (Associated Press)

Hall of Fame defensive back Jimmy Johnson of the San Francisco 49ers. (National Football League)

Hall of Fame defensive back Jimmy Johnson of the San Francisco 49ers. (National Football League)

Jimmy Johnson, Randy White, Jackie Smith, Bud Grant, Leroy Kelly, and Tony Dorsett are introduced as the Pro Football Hall of Fame Class of 1994 before the 1994 NFL Pro Bowl played on February 6, 1994 at Aloha Stadium. (National Football League)

Bud Grant, Randy White, Leroy Kelly, Jackie Smith, Tony Dorsett, and Jimmy Johnson are introduced as the Pro Football Hall of Fame Class of 1994 on the field before the NFC's 17-3 victory over the AFC in the 1994 NFL Pro Bowl played on February 6, 1994 at Aloha Stadium. (National Football League)

San Francisco 49ers Hall of Fame cornerback Jimmy Johnson in 1970. (National Football League)

San Francisco 49ers hall of famer Jimmy Johnson, left, is honored by owner Jed York before an NFL football game against the St. Louis Rams in San Francisco, Sunday, Dec. 4, 2011. (AP Photo/Paul Sakuma)