WASHINGTON, D.C. - MARCH 4: Washington Redskins Hall of Fame running back John Riggins poses for his NFL ProLine Profile card on March 4, 1993 in Washington, D.C. (National Football League)

Sirius XM NFL radio analysts (from left) Shannon Sharpe, John Riggins, Gil Brandt, Solomon Wilcots, and Randy Cross talk to the media at a press conference at the Super Bowl XLIII Media Center at the Tampa Convention Center on January 28, 2009 in Tampa, Florida. (AP Photo/Paul Spinelli)

Washington Redskins fullback John Riggins (44) carries the ball against the San Francisco 49ers, in Washington. (AP Photo)

Hall of Fame running back John Riggins of the Washington Redskins fights off two defenders during a 30-7 win over the Los Angeles Rams on December 20, 1981 at Anaheim Stadium in Anaheim, California. (National Football League)

Hall of Fame running back John Riggins of the Washington Redskins looks for room to run during a 30-7 win over the Los Angeles Rams on December 20, 1981 at Anaheim Stadium in Anaheim, California. (National Football League)

Hall of Fame running back John Riggins (44) of the Washington Redskins carries the football and heads for the goal line to score on a 1-yard touchdown run during the Redskins 42-20 victory over the Los Angeles Rams on November 20, 1983 at Anaheim Stadium. (National Football League)

Hall of Fame running back John Riggins (44) of the Washington Redskins carries the football and crosses the goal line to score on a 1-yard touchdown run during the Redskins 42-20 victory over the Los Angeles Rams on November 20, 1983 at Anaheim Stadium in Washington. (National Football League)

Los Angeles Rams linebacker Carl Ekern (55) and safety Nolan Cromwell (21) team up to stop Redskins Hall of Fame running back John Riggins (44) during the Rams 30-7 loss to the Washington Redskins on December 20, 1981 at Anaheim Stadium in Anaheim, California. (National Football League)

John Riggins, Al Davis, John Mackey, and Lem Barney are introduced as the Pro Football Hall of Fame Class of 1992 on the field before the NFC's 21-15 victory over the AFC in the 1992 NFL Pro Bowl played on February 2, 1992 at Aloha Stadium in Honolulu, Ha. (National Football League)

Hall of Fame running back John Riggins (44) of the Washington Redskins takes the handoff and carries the football on a 4th down 43-yard touchdown run during the 4th quarter of the Redskins 27-17 victory over the Miami Dolphins in Super Bowl XVII. (National Football League)

Washington Redskins head coach George Allen, left, laughs it up with running back John Riggins at Redskin Park in Chantilly, Va., June 10, 1976, as they announce that Riggins has signed a series of one-year contracts with the Redskins. Riggins played out his option last year with the New York Jets. (AP Photo/Charles Harrity)

Washington Redskins running back John Riggins (44) who ran for over 100 yards against the Minnesota Vikings in an NFC Playoff game runs past Minnesota Vikings John Swain (29) for more yardage at RFK Stadium, Saturday, Jan. 15, 1983, Washington, D.C. The Redskins won 21-7. (AP Photo/Ira Schwarz)

Washington Redskins' John Riggins (44) is pursued by Michael Downs (26) of the Dallas Cowboys in first half action, Jan. 22, 1983 in Washington. (AP Photo)

Washington Redskins John Riggins (44) smiles broadly as he receives congratulations following fourth quarter touchdown run against the Miami Dolphins in Super Bowl XVII, Sunday, Jan. 30, 1983, Pasadena, Calif. Congratulating Riggins after his TD run are Skins Charlie Brown (87) and Virgil Seay (80). The rest of the players are unidentified. (AP Photo)

Washington Redskins running back John Riggins (44) barrels downfield for a second half touchdown against the Miami Dolphins in Super Bowl XVII at the Rose Bowl, Sunday, Jan. 30, 1983, Pasadena, Calif. Riggins set a Super Bowl rushing record. (AP Photo)

Washington Redskins running back John Riggins (44) runs upfield behind offensive guard Russ Grimm (68) in Super Bowl XVII resulting in a 17 to 27 Washington Redskins victory over the Miami Dolphins on January 30, 1983 at the Rose Bowl in Pasadena,CA. (National Football League)

Washington Redskins John Riggins (44) runs the ball during the NFL football game between the Los Angeles Raiders and the Washington Redskins in Washington, DC on October 2, 1983. Redskins won the game 37-35. (AP Photo/Paul Spinelli)

Washington Redskins running back John Riggins (44) breaks through the line during the NFL football game between the Washington Redskins and the New York Giants on October 28, 1984 in East Rutherford, New Jersey. The Giants won the game 37-13. (AP Photo/Paul Spinelli)

Washington Redskins running back John Riggins (44) high steps over bodies as he runs the ball while trying to avoid a tackle attempt and face mask grab by New York Giants linebacker Gary Reasons (55) during the NFL game on October 20, 1985 in East Rutherford, New Jersey. The Giants won the game 17-3. (AP Photo/Paul Spinelli)

Washington Redskins running back John Riggins (44) takes oxygen on the bench as he checks out the scoreboard during the NFL football game against the New York Giants on October 20, 1985 in East Rutherford, New Jersey. The Giants won the game 17-3. (AP Photo/Paul Spinelli)

New York Jets Hall of Fame running back John Riggins (44) in 1972. (National Football League)

Running back John Riggins of the Kansas Jayhawks, who later enjoyed a Hall of Fame career for the New York Jets and Washington Redskins, was the Jets number one draft choice (number six overall) of the 1971 draft. (National Football League)

Washington Redskins running back John Riggins (44) gets away from Dallas Cowboys safety Michael Downs (26) during game at RFK Stadium in Washington, Oct. 15, 1984. (AP Photo/J. Scott Applewhite)

Washington Redskins running back John Riggins (44) is forced out of bounds by Los Angeles Rams George Andrews (52) and Ivory Sully (37) after powering for a big gain during first half action in Anaheim, Dec. 20, 1981. (AP Photo/Lennox McLendon)

Washington Redskins running back John Riggins, left, is caught on a run by the New York Giants Mark Haynes in the first quarter of their game at Giants Stadium in East Rutherford, N.J., Nov. 15, 1981. (AP Photo/Ray Stubblebine)

Washington Redskins running back John Riggins breaks a tackle by Philadelphia Eagles Randy Logan (41) to score a fourth quarter touchdown during action in Philadelphia, Sept. 11, 1983. (AP Photo/Peter Morgan)