The UFC's "Primetime" series returns Friday with a three-part special for UFC 146: Dos Santos vs. Mir. UFC heavyweight champion Junior dos Santos and challenger and former champion Frank Mir will be the focus of a three-part "UFC Primetime" special for their main event. The two fight May 26 at UFC 146 at the MGM Grand Garden Arena in Las Vegas. After the first episode airs, the FX cable network will air the second and third parts on the next two Fridays leading into the event. The first episode...