Team officials don't believe the injury is serious.
"He had a little twinge there in his knee and our trainers thought it would be best to give him the afternoon off," team owner/general manager Jerry Jones said. "At this time we are not concerned."
Coach Jason Garrett said Claiborne suffered the knee injury during Wednesday's practice, and after a off day, the knee didn't feel right during the early portions of Friday's practice. Claiborne missed close to two hours of practice time.
"He got treatment on it (Thursday)," Garrett said. "His knee flared up a little bit on him so he tried to go in the early part of practice, and we took him out of it."
Claiborne wasn't the only Cowboys' player taken out of practice Friday. Third-round pick Tyrone Crawford, a defensive end, had to leave with a calf injury.
Outside linebacker Anthony Spencer also missed Friday's practice and won't participate on Saturday as he recovers from a hamstring injury.
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