NFLDraftScout.com's No. 1-rated cornerback, Claiborne said he suffered the injury during LSU's 9-6 win over Alabama but played through it the remainder of the season. He didn't mention the injury at the Scouting Combine in Indianapolis last month.
Claiborne, who ran a 4.39-second 40-yard dash at Friday's Pro Day, improving on his unofficial time of 4.47 at the Combine, is currently project to go No. 6 to St. Louis by Rob Rang and No. 4 to Cleveland by Dane Brugler in their current Mock Drafts.
Claiborne said he has also been invited by the NFL to be at the first day of the draft in New York City on April 26.
"It will be my first time going up there," he said. "I'll be going with my family and we're going to try and enjoy it. Coach Miles is going with me.
"I'm very excited. As a kid you dreasm about those things, going up to New York, being in the Green Room, bringing your family."