FRISCO -- David Irving was on crutches, trying to steady himself, with his left foot in a boot.
Dak Prescott walked past as the defensive tackle turned to leave the Cowboys locker room.
"You OK?" the quarterback asked.
"Yeah," Irving said. "It hurts though.
"A lot."
Irving injured himself in Thursday's practice and was carted off the field. X-rays were negative. The initial diagnosis is a high-ankle sprain, an injury that should keep him from playing Monday night against Tennessee and beyond.
Irving was on his way to see team physician Dr. Dan Cooper for a more thorough evaluation as he left the locker room.