Dallas Cowboys former running back Duane Thomas responds to a reporters question during NFL football training camp, Saturday, July 26, 2008, in Oxnard, Calif. (AP Photo/Tony Gutierrez Stock Photo - Alamy
Bengals-Eagles Game Release 12.13.12_Game Release - NFL.com
Philadelphia Eagles running back DeMarco Murray scores a touchdown run against the New York Giants during the second half of an NFL football game Monday, Oct. 19, 2015, in Philadelphia. (AP Photo/Matt
Philadelphia Eagles running back DeMarco Murray (29) is tackled by Detroit Lions middle linebacker Stephen Tulloch (55) and defensive tackle Haloti Ngata (92) during an NFL football game at Ford Field in
Philadelphia Eagles running back DeMarco Murray scores a touchdown run against the New York Giants during the second half of an NFL football game Monday, Oct. 19, 2015, in Philadelphia. (AP Photo/Matt
Dallas Cowboys' DeMarco Murray (29) finds running room as quarterback Tony Romo, rear, watches during the second half of an NFL football game against the Philadelphia Eagles, Thursday, Nov. 27, 2014, in
Injured Dallas Cowboys quarterback Tony Romo meets with former teammate Philadelphia Eagles' DeMarco Murray after an NFL football game, Sunday, Sept. 20, 2015, in Philadelphia. Dallas won 20-10. (AP Photo/Michael Perez Stock
Injured Dallas Cowboys quarterback Tony Romo meets with former teammate Philadelphia Eagles' DeMarco Murray after an NFL football game, Sunday, Sept. 20, 2015, in Philadelphia. Dallas won 20-10. (AP Photo/Michael Perez Stock
DeMarco Murray refuses to be slowed by hurting hand
Former Dallas Cowboys quarterback Tony Romo addresses fans in attendance before an NBA basketball game between the Denver Nuggets and Dallas Mavericks in Dallas, Tuesday, April 11, 2017. (AP Photo/Tony Gutierrez Stock
Official Super Bowl XLIX Game Program
Philadelphia Eagles running back Tony Hunt, right, runs back a play at training camp during the morning session at Lehigh University in Bethlehem, Pennsylvania, Wednesday, July 30, 2008. (Photo by Steven M.
Dallas Cowboys quarterback Tony Romo (9), his left arm in a sling, greeted former teammate Philadelphia Eagles running back DeMarco Murray (29) as the Cowboys beat the Eagles 20-10 on Sunday, Sept.