Turns out Alabama linebacker Rolando McClain hasn't just been fighting a hamstring injury.

At the Tide's Pro Day earlier today, McClain, who skipped individual drills at the combine due to an injured hamstring he suffered Oct. 24 against Tennessee, revealed he has Crohn's Disease, an inflammatory disease of the intestines. The Butkus Award winner (given to the nation's best linebacker) said he's taken medication for the disease since his freshman year of high school.

The Giants are believed to have interest in McClain, who is leaving school after his junior season, to replace Antonio Pierce at MLB.

He ran an impressive 4.6 40-yard dash today, but became ill during agility drills.

In the week leading up to the national championship game, McClain missed a practice due to "a stomach virus," according to the Alabama medical staff. It is not known whether or not the school's medical team knew about McClain's condition or if they were helping him cover it up.

"[He] ate something wrong last night or whatever," Alabama linebackers coach James Willis said at the time.

It'll be interesting to see if this revelation hurts McClain's draft stock (he's projected to be first-round choice). Even with the condition, he racked up 105 tackles, including 14.5 for a loss, with four sacks and two interceptions last season.

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