Dallas Cowboys running back Tony Dorsett (33) gestures during the NFL football game between the Dallas Cowboys and the New York Giants in East Rutherford, New Jersey on October 30, 1983. The Cowboys won the game 38-20 (AP Photo/Paul Spinelli)

Dallas Cowboys running back Tony Dorsett (33) rests during an NFL football game against the San Francisco 49ers on Sunday, Dec. 22, 2085 in San Francisco. The 49ers won the game 31-16. (AP Photo/Greg Trott)

San Francisco 49ers vs.Dallas Cowboys at Candlestick Park Sunday, January 10. 1982. 49ers beat Cowboys 28-27 for Conference Championship. Dallas Cowboys Running Back Tony Dorsett (33) make run in open field. (AP Photo/Al Golub)

San Francisco 49ers vs.Dallas Cowboys at Candlestick Park Sunday, January 10. 1982. 49ers beat Cowboys 28-27 for Conference Championship. Dallas Cowboys Running Back Tony Dorsett (33) and Wide receiver Jay Saldi (87) celebrate touchdown. (AP Photo/Al Golub)

Dallas Cowboys running back Tony Dorsett carries the ball toward a Green Bay Packers defender during second quarter action in Irving, Texas, on Sunday, Jan. 17, 1989. Dorsett rushed for 99 yards to help his team to a 37-26 victory. (AP Photo/Mike Murphy)

Dallas Cowboys placekicker Rafael Septien, right, pats teammate Tony Dorsett on the head after his record setting 99 1/2 yard touchdown run in the fourth quarter of a game against the Minnesota Vikings in Minneapolis on Jan. 4, 1983. The Vikings won 31-27. (AP Photo/Jim Mone)

Dallas Cowboys quarterback Danny White (11) looks on while Cowboys running back Tony Dorsett (33) runs the ball behind a lead block by Cowboys fullback Ron Springs (20) during the NFL football game between the Dallas Cowboys and the New York Giants in East Rutherford, New Jersey on October 30, 1983. The Cowboys won the game 38-20 (AP Photo/Paul Spinelli)

Running back Tony Dorsett #33 of the Dallas Cowboys runs upfield against the New York Giants at Giants Stadium on September 10, 1978 in East Rutherford, New Jersey. The Cowboys defeated the Giants 34-24. (Fred Roe/NFL Photos)

Dallas Cowboy running back Tony Dorsett turns the corner during a 29-17 victory over the Los Angeles Rams on October 18, 1981, at Texas Stadium in Irving, Texas. (National Football League)

Running back Tony Dorsett #33 of the Dallas Cowboys runs upfield against the Denver Broncos in Super Bowl XI at the Superdome on January 15, 1978 in New Orleans, Lousiana. The Cowboys defeated the Broncos 27-10. (Nate Fine/NFL Photos)

Dallas Cowboys Hall of Fame running back Tony Dorsett in 1984. (National Football League)

Dallas Cowboys Hall of Fame running back Tony Dorsett (33) tramples everyone on the field as he runs for 102 yards with a 5 and 55 yard touchdowns and passes Larry Csonka to become the 8th all-time rusher with 8,153 yards during a win over the St. Louis Cardinals 35-17 on November 24, 1983, Thanksgiving Day at Texas Stadium in Irving, Texas. This made the Cowboys Thanksgiving Classic record 12-3-1. (Jay Dickman/NFL)

Hall of Fame running back Tony Dorsett (33) of the Dallas Cowboys carries the football before being stopped during the Cowboys 20-0 loss to the Los Angeles Rams in the 1985 NFC Divisional Playoff Game on January 4, 1986 at Anaheim Stadium in Anaheim, California. (National Football League)

Tony Dorsett of the Dallas Cowboys, is shown in 1978. (Associated Press)

Running back Tony Dorsett of the Dallas Cowboys runs upfield against the Los Angeles Rams. (National Football League)

Running backs Tony Dorsett and Herschel Walker of the Dallas Cowboys. (National Football League)

Los Angeles Rams linebacker Jim Collins (50) has the angle on Dallas Cowboys Hall of Fame running back Tony Dorsett (33) during a 29-21 Cowboys victory on December 21, 1987, at Anaheim Stadium in Anaheim, California. (National Football League)

Running back Tony Dorsett of the Dallas Cowboys watches from the sideline during a 27-14 loss to the Los Angeles Rams on September 17, 1978, at Los Angeles Memorial Coliseum in Los Angeles, California. (National Football League)

Dallas Cowboys Hall of Fame running back Tony Dorsett in 1984. (National Football League)

Dallas Cowboys Hall of Fame running back Tony Dorsett (33) became the 4th running back to surpass the 12,000 yard mark for rushing in a victory over the Los Angeles Rams 29-21 on December 21, 1987 at Texas Stadium in Irving, Texas. (National Football League)

Tony Dorsett of Pitt, already the eighth leading rusher in college football history, prepares for a practice session in Pittsburgh, Oct. 29, 1975. Dorsett is only a junior and he has another full season to pursue Archie Griffin's all-time college football record. (AP Photo/Harry Cabluck)

Dallas Cowboys running back Tony Dorsett holds the ball aloft after scoring a first quarter touchdown against the Denver Broncos in Super Bowl XII. (Associated Press)

Dallas Cowboys running back Tony Dorsett sports a smile, a "number one" sign and crutches as he stands beside his car while leaving his hotel for Dallas, Monday, Jan. 16, 1978, New Orleans, La. His team beat the Denver Broncos in Sunday's Super Bowl for the National Football League title. (Associated Press)

Dallas Cowboys Hall of Fame running back Tony Dorsett (33) runs upfield during game against the Los Angeles Rams at the Los Angeles Memorial Coliseum, Sept. 17, 1978. The Rams defeated the Cowboys 27-14. (National Football League)

Dallas Cowboys running back Tony Dorsett (33) eludes Pittsburgh Steelers Tony Dungy (21) defender during Super Bowl XIII, Jan. 21, 1979. (Associated Press)

As host Richard Dawson, center, watches, Dallas Cowboys running back Tony Dorsett, right, grimaces and Cowboys cheerleader Suzette Scholz-Derrick waves happily after Suzette beat Dorsett with a correct answer during taping June 25, 1980 of "The Family Feud" game show at ABC television studios in Los Angeles. Five Cowboys footballers meet five Cowboys cheerleaders for week of competition on the popular daytime game show. (AP Photo/Randy Rasmussen)

Tony Dorsett (33) flashes the "big one" signal as the Sugar Bowl ended with Pitt defeating Georgia 27-3, Jan. 1, 1976, New Orleans, La. Dorsett broke the Sugar Bowl rushing record. The woman on the left is unidentified. (Associated Press)

Dallas Cowboys Hall of Fame running back Tony Dorsett (33) runs upfield during game against the Pittsburgh Steelers at Texas Stadium in Irving, Oct. 13, 1985. The Cowboys defeated the Steelers 27-13. (National Football League)

University of Pittsburgh tailback Tony Dorsett is brought down by several William and Mary defenders after gaining three yards over right tackle during the first quarter of their game, Sept. 27, 1975 in Pittsburgh. Pitt won the game, 47-0, and Dorsett gained 142 yards and scored three times. (Associated Press)

Pittsburgh halfback Tony Dorsett holds the ball aloft as he runs past Temple safety Chuck Gill on a two point conversion during third quarter action in Pittsburgh Saturday afternoon, September 27, 1976. Pittsburgh won it 21-7. (Associated Press)

Hall of Fame running back Tony Dorsett runs in the open field in the Univerity of Pittsburgh's 27-3 win over the Georgia Bulldogs in the 1977 Sugar Bowl on January 1, 1977. (National Football League)