We've heard actor Guillermo Diaz described as an indie favorite, but we regret to inform you that he'll have to hang up his well-deserved underground reputation soon. With stand-out roles in 'Weeds,' 'Mercy' and an upcoming Kevin Smith film, Diaz is rapidly trading his "that guy" status for on-the-street recognition. The actor - one of our personal TV heroes - spoke exclusively to PopEater about the thugs he's played (and loved), the kinder gentler Diaz on NBC's new hospital drama 'Mercy,' and whether Tracy Morgan is as nutbar crazy as he seems on TV.