'Late Show': Jeremy Piven Candid About Mercury Poisoning Controversy

On Tuesday night's "Late Show with David Letterman," Emmy-winning "Entourage" star Jeremy Piven opens up to Dave about the controversy surrounding his exit from the Broadway play Speed the Plow last year.

Last week an arbitrator ruled in Piven's favor after he was sued by the producers of David Mamet's Speed the Plow after he left the show citing mercury poisoning, "which sounds like a rich man's disease," Piven tells Dave, "sounds like something you might get from the leather seats in your Lamborghini, like a rash, like a rash that hurts."

Piven says the doctors who tested him said, "'You've got elevated levels of mercury we've never seen before, basically almost a 60. We should not have anything above a 3.'" He added that he "also had Epstein-Barr, which is, you know, mono. … There were so many different variables that were contributing to my situation."