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Why Kevin Casey quit the TUF fight this week
Fans don't see what goes on behind the scene, I was admitted to the hospital and was diagnosed with acute renal failure. Care to look it up.
— King Kevin Casey (@kevinkocasey) March 20, 2013
Apparently it really had something to do with his kidneys, as he stated in the show. http://en.wikipedia.org/wiki/Renal_failure

