Enshrinee Earl Campbell is introduced during the Pro Football Hall of Fame enshrinement ceremony Saturday, Aug. 2, 2014, in Canton, Ohio. (David Richard/Associated Press)

Houston Oilers Earl Campbell(34) in action during a game against the Atlanta Falcons. Earl Campbell played for 9 years with 2 teams and was inducted to the Pro Football Hall of Fame in 1991. (David Durochik/Associated Press)

Earl Campbell looks into the camera after he was picked by the Houston Oilers as the first pick in the first round of the national football draft, Tuesday, May 2, 1978 in New York. (AP Photo/Pickoff)

Earl Campbell, left, and National Football League Commissioner Pete Rozelle hold up Campbell?s jersey after Campbell was chosen by the Houston Oilers as the No. 1 draft choice in the first round of the NFL draft, Tuesday, May 3, 1978 in New York. (Pickoff/Associated Press)

Billie Jean King, left, and Earl Campbell pose, Tuesday, Feb. 6, 1979 in New York's downtown athletic club during club's 18th annual all-sports nite and night of champions. Ms. King was presented with the Robert Stewart-presidents council award for contributions to sports and fitness, Campbell, the Houston Oilers star, was presented with the club�s championship award. (Carlos Perez/Associated Press)

Earl Campbell (34) running back for the Houston Oilers cannonballs through the defending Cincinnati Bengals for a 36 yard gain to set up an Oilers Touchdown at the end of the first half, Nov. 19, 1979 in Houston. Bo Harris (53) a Bengal linebacker finally brings Campbell down at the two yard line. The Oilers had rushed for over 300 yards in the first half of play. (Associated Press)

Houston Oilers Earl Campbell stands on sidelines during final period of AFC championship game against Steelers Sunday, Jan. 7, 1980 at Pittsburgh. Campbell had a bad day while gaining only 15 yards in 17 attempts as Oilers lost, 27-13. (Associated Press)

Houston Oiler�s Earl Campbell left, and University of Southern California's Charles White display the trophies they received from Maxwell Club is Philadelphia, Wednesday, Jan. 31, 1980 after being named professional football player of the year, and college player of the year respectively. (Puskar/Associated Press)

Houston Oilers running back Earl Campbell runs in practice in Houston on Oct. 31, 1980. (Associated Press)

New Orleans Saints' running back Earl Campbell (35) picks up yardage around the right end in the second quarter Sunday night, Oct. 21, 1984 against the Dallas Cowboys at Irving, Texas. (Lou Krasky/Associated Press)

New Orleans Saints Hall of Fame running back Earl Campbell (35) runs upfield during game against the Los Angeles Raiders at the Los Angeles Coliseum, Oct. 13, 1985. The Raiders defeated the Saints 23-13. (AP Photo/NFL Photos)

Fred Akers, left, University of Texas coach, and Heisman Trophy winner Earl Campbell hold trophys presented to them by the Pigskin Club of Washington Friday night December 9, 1977 in Washington, D.C.. Akers was named NCAA Division I coach of the year. Campbell the offensive player of the year. (Associated Press)

Football running back Earl Campbell poses in his Houston Oilers uniform on Dec. 8, 1977. Campbell was the number 1 draft pick by the Houston Oilers and was voted Rookie of the Year as well as Most Valuable Player in 1977. (Associated Press)

Earl Campbell of the University of Texas gets a kiss from his mother, Ann, as he keeps one hand on the Heisman Trophy after it was awarded to him at night in New York, Thursday, Dec. 8, 1977. Campbell was honored as the outstanding college football player in the country for the 1977 season. (AP Photo/Ray Stubblebine)

A tired Earl Campbell sits in his new off-campus apartment in Austin, Tex., after moving there from his dormitory at the University of Texas, Dec. 1, 1977. The record-breaking football running back has been mentioned as a possible Heisman Trophy winner. (Associated Press)

Houston Oilers Hall of Fame running back Earl Campbell circa 1984. (National Football League)

Earl Campbell (34) Oilers running back, against Browns, Dec. 2, 1979. (Associated Press)

Former Houston Oilers great Earl Campbell poses with his bronzes bust after his enshrinment in the Pro Football Hall of Fame, Saturday, July 27, 1991 in Canton, Ohio. (AP Photo/Bruce Zake)

Houston Oilers running back Earl Campbell, inducted into the Pro Football Hall of Fame class of 1991, flashes a hook 'em horns hand sign during a 35 to 30 victory over the Miami Dolphins on November 20, 1978, at the Houston Astrodome in Houston, Texas. Campbell rushed for 199 yards from scrimmage on 28 carries, scoring four touchdowns. He was the 1977 Heisman trophy receipent out of the University of Texas and the Oilers number one draft choice in 1978. (Lou Witt/NFL)

Houston Oilers running back Earl Campbell (34), runs upfield during a 35 to 30 victory over the Miami Dolphins on November 20, 1978, at the Houston Astrodome in Houston, Texas. Campbell rushed for 199 yards from scrimmage on 28 carries, scoring four touchdowns. (Lou Witt/NFL)

Hall of Fame running back Earl Campbell cuts upfield in a 20-6 win over the Kansas City Chiefs in the Houston Astrodome on 9/16/1979. (Lou Witt/NFL)

Running back Earl Campbell of the Houston Oilers takes off on a run in a 35 to 14 loss to the Philadelphia Eagles on December 19, 1982. (Edwin Mahan/NFL)

Hall of Fame Houston Oilers running back Earl Campbell straight-arms Buffalo defensive back Mario Clark (29) in a 30-13 loss to the Bills in Rich Stadium on September 29, 1983. (Lou Witt/NFL)

Hall of Fame running back Earl Campbell of the Houston Oilers carries the ball against the Miami Dolphins during a 17-9 victory over the Dolphins in the 1978 AFC Wild Card Playoff Game on December 24, 1978 at the Orange Bowl in Miami, Florida. (Al Messerschmidt/NFL)

Houston Oilers running back Earl Campbell rushes upfield against the New York Jets in October 1981. (Al Messerschmidt/NFL)

Houston Oilers running back Earl Campbell (34) pushes Denver Broncos Tom Jackson (57) off as he turns the corner after taking a pass in the flats during the first quarter of the NFL game, Aug. 5, 1978 in Houston. Campbell picked up eight yards on the play, but it was nullified on a penalty. Denver's Randy Gradishar (53) moves in to help stop Campbell. (AP Photo/Ed Kolenovsky)

Houston Oilers running back Earl Campbell carries the ball as he glides away from New York Jets linebacker Lance Mehl after taking the pass from quarterback Oliver Luck, in the first quarter of exhibition football, on August 23, 1982, at the Dome in Houston, Texas. (Associated Press)

Houston Oilers' Earl Campbell is seen during a game against the Dallas Cowboys, Aug. 25, 1984. (Associated Press)

Earl Campbell, center, of New Orleans Saints, goes against Terry Kinard of the New York Giants during NFL action at Giants Stadium in East Rutherford, N.J., Saturday afternoon, Dec. 15, 1984. Wayne Wilson, left of New Orleans, gets into the action. The Saints won the game 10-3. (AP Photo/Forrest Anderson)

Houston Oilers running back Earl Campbell rushes upfield against the New York Jets in October 1981. (Al Messerschmidt/NFL)

Houston Oilers running back Earl Campbell (34), inducted into the Pro Football Hall of Fame class of 1991, gets away from Miami Dolphins defensive end A.J. Duke (77) during the AFC Wildcard Playoff, a 17-9 Oilers victory on December 24, 1978, at the Orange Bowl in Miami, Florida. (Al Messerschmidt/NFL)

Houston Oilers running back Earl Campbell (34), inducted into the Pro Football Hall of Fame class of 1991, takes the handoff from quarterback Dan Pastorini (7) as center Carl Mauck (55) gets ready to set up his blocking during the AFC Wildcard Playoff, a 17-9 victory over the Miami Dolphins on December 24, 1978, at the Orange Bowl in Miami, Florida. (Al Messerschmidt/NFL)

Houston Oilers Earl Campbell gets the ball a makes a play in a game verse the New York Jets on Sunday November 23, 1980 in Flushing, NY. (Kevin Reece/Associated Press)