Injury report: Spencer gets nicked up

OXNARD, Calif. -- The Dallas Cowboys suffered a potentially season-ending injury during their first training camp practice.

Here's our daily injury report:

Tyrone Crawford suffered a torn left Achilles tendon during an individual non-contact drill. It's the second consecutive season in which the Cowboys have lost a player to this injury in training camp. Last season, linebacker Caleb McSurdy suffered the same injury during individual drills.

Anthony Spencer missed the last hour of practice with a balky left knee. Spencer said he tweaked the same knee he hyperextended during offseason workouts. The linebacker said he rested as a precaution. Kyle Wilber replaced him with the first team.

Nate Livings (foot) is on the physically unable to perform list, but there's hope he can return by midweek.

Ryan Cook didn't practice because he failed Saturday's conditioning test.

Ronald Leary (calf) missed practice, and his status is day-to-day.

Mackenzy Bernadeau (hamstring) hasn't practiced the entire offseason. He missed time recovering from shoulder surgery, and now he's out with a hamstring injury suffered during the conditioning test.

Demetress Bell, like Cook, didn't pass the conditioning test. Until he passes it, he won't participate.

• L.P. Ladouceur (calf) is out, but the team isn't concerned about his long-term status.

Jay Ratliff (hamstring) will practice when his strained hamstring heals. Ratliff is on the PUP list, but he passed the conditioning test. He strained his hamstring while running it.