Woes continue to mount for the Dallas Cowboys along the defensive line.
A unit that is already without starting ends DeMarcus Lawrence and Randy Gregory because of substance abuse suspensions is now dealing with an injury to starting defensive tackle Tyrone Crawford.
Crawford, who underwent should surgery on the off-season, has now missed practiced the past two days because of a sore back.
He underwent a magnetic resonance imaging exam on his back Sunday and the Cowboys are hoping for the best, listing him as day to day.
Coach Jason Garrett said Crawford did not complain of back problems during the off-season and this is something that has developed since the start of training camp three days ago.
A long-term setback for Crawford would cripple the defense, which is counting on him for an interior pass rush.
Exacerbating the issue even further is that the Cowboys are without defensive tackle Maliek Collins, a third-round pick from Nebraska who is starting camp on the physically unable to perform list because of a fractured foot suffered in organized team activities in May.
The Cowboys had considered starting Collins at tackle and moving Crawford to end to help make of the loss of Lawrence and Gregory. But that was before Collins went down.
And now Crawford is on the sidelines as well on the third day of training camp, the day the team put on pads for the first time.