The Dallas Cowboys' first full day of training-camp practice unfortunately brought the first potentially serious injury.
"I can't (expletive) believe this," Crawford said, according to the Star-Telegram.
The Boise State product was expected to play an important role as the Cowboys' top backup at defensive end behind starters Anthony Spencer and DeMarcus Ware. Crawford might have had flexibility to move inside to tackle, too.
The Cowboys have a top-heavy roster throughout their defense, with a noticeable lack of depth. Losing Crawford on Day 1 would be a discouraging start to camp.Follow Gregg Rosenthal on Twitter @greggrosenthal.