Dallas Cowboys defensive tackle Bob Lilly (74) attempts to hold back offensive center Bob DeMarco in Super Bowl VI on January 16, 1972 at Tulane Stadium. (National Football League)

Miami quarterback Bob Griese (12) is dropped behind the line by Dallas defensive tackle Bob Lilly (74) during Sunday's Super Bowl game in New Orleans, January 16, 1972. (Associated Press)

Green Bay Packers quarterback Bart Starr (15) of the Western Conference team is surrounded by opposing team members and is about to be tossed for a 15-yard loss in Pro Bowl game in Los Angeles, Calif., on Jan. 22, 1967. Defenders include tackle Bob Lilly (74) of the Dallas Cowboys and Ben McGee (75) of the Pittsburgh Steelers. (Associated Press)

Bob Lilly, tackle for the Dallas Cowboys, signs his autograph on Football for 9-year-old Joseph Piccolo on Monday, May 22, 1972 at reception before dinner of Pro Football writers of America at New York's Americana Hotel. Lilly was honored at the dinner by the writers organization as pro football's "Superman of the Year". (Associated Press)

John Brodie (12) San Francisco 49ers quarterback, wasn't quite fast enough to get away from Dallas Cowboy tackle Bob Lilly (74) who came charging through the line to drop Brodie for a loss in the second quarter of the NFC Championship at Texas Stadium, Jan. 2, 1972, Dallas, Tex. (Associated Press)

Bob Lilly, Dallas Cowboys All-Pro defensive tackle is shown in a whirlpool bath at the Cowboy's training room Dec. 27, 1972 in Dallas, Texas. (Associated Press)

Hall of Fame defensive tackle Bob Lilly (74) of the Dallas Cowboys during the Cowboys 24-3 victory over the Miami Dolphins in Super Bowl VI on January 16, 1972 at Tulane Stadium in New Orleans, Louisiana. (National Football League)

Hall of Fame defensive tackle Bob Lilly (74) of the Dallas Cowboys chases Dolphins Hall of Fame quarterback Bob Griese (12) during the Cowboys 24-3 victory over the Miami Dolphins in Super Bowl VI on January 16, 1972 at Tulane Stadium in New Orleans, Louisiana. (National Football League)

Dallas Cowboys defensive tackle Bob Lilly is shown, 1974. (Associated Press)

The four new members of the Pro Football Hall of Fame pose outside the facility after their enshrinement, Aug. 2, 1980 in Canton, Ohio. They are, from left, former Green Bay Packers cornerback Herb Adderley, former Dallas Cowboys defensive tackle Bob Lilly, former Los Angeles Rams defensive end Deacon Jones and former Oakland Raiders center Jim Otto. (Associated Press)

Bob Lilly, defensive tackle of the Dallas Cowboys is shown with a camera in Dallas, Texas, Sept. 22, 1971. Lilly enjoys photography as a hobby and is show with 400mm lens that he uses to photograph wildlife. (AP Photo/Ferd Kaufman)

Dallas Cowboys defensive tackle Bob Lilly #74 of the East runs in pursuit against the West in the 1966 NFL Pro Bowl at the Los Angeles Memorial Coliseum on January 15, 1966 in Los Angeles, California. The East defeated the West 36-7. (National Football League)

Lamar Hunt, left, owner of the Kansas City Chiefs, and Bob Lilly, tackle for the Dallas Cowboys, display portraits of themselves, May 22, 1972 at a dinner of the Football Writers of America in New York's Americana Hotel. (AP Photo/May 22, 1972. (AP Photo/John Lent)

Defensive tackle Bob Lilly of the Dallas Cowboys. (National Football League)

Pro Football Hall of Fame inductees Herb Adderley, Deacon Jones, Bob Lilly, and Jim Otto at the NFL Pro Bowl, a 37-27 NFC victory on January 27, 1980, at Aloha Stadium in Honolulu, Hawaii. (National Football League)

Pro Football Hall of Fame inductees Bob Lilly, Herb Adderley, Jim Otto, and Deacon Jones before the NFL Pro Bowl, a 37-27 NFC victory on January 27, 1980, at Aloha Stadium in Honolulu, Hawaii. (National Football League)

Hall of Fame defensive tackle Bob Lilly (74) of the Dallas Cowboys sacks Dolphins Hall of Fame quarterback Bob Griese (12) for a 29-yard loss during the Cowboys 24-3 victory over the Miami Dolphins in Super Bowl VI on January 16, 1972 at Tulane Stadium in New Orleans, Louisiana. (National Football League)

Dallas Cowboys defensive tackle Bob Lilly (left) presents a star from Texas Stadium to Pro Football Hall of Fame representative Steve Perry (center) as Cowboys owner Jerry Jones (right) watches during an NFL preseason football game with the Cincinnati Bengals, Sunday, August 8, 2010 at Pro Football Hall of Fame Field at Fawcett Stadium in Canton, Ohio. The Cowboys won the game, 16-7. (AP Photo/James D Smith)

Dallas Cowboys former player Bob Lilly before a halftime ceremony during an NFL football game against the New York Giants, Sunday, Sept. 20, 2009, in Arlington, Texas. (AP Photo/Sharon Ellman)

Helmets signed by Hall of Famer Bob Lilly are seen at the McKinley Grand Hotel in Canton, Ohio on August 3, 2012. (AP Photo/Ben Liebenberg)