The No. 6 pick in this year's draft had surgery on the wrist in April to repair a ligament. He continues to rehab when he's not on the field. As for the drills, Claiborne says it's not a problem. From the Dallas Morning News:
Asked to describe his left wrist brace after practice Thursday, Cowboys cornerback Morris Claiborne said it's "a little Megatron type thing." The extra protection was custom made specifically for Claiborne, preventing his surgically-repaired wrist from bending backward.
He added: "In college, I wore a little brace on it, so it's nothing new to me. I'm used to it. As long as I got my hand, I'm good."