Dr. Jekyll and Mr. Hyde. Harvey Dent and Two-Face. Katy Perry’s fiancé in her 2008 smash hit Hot and Cold. All three of these gentlemen are famously in cahoots with themselves, never able to truly pin down whether they desire to be their best selves or give into the voices and spurn good for evil. When Carlos Vargas, the latest addition to the Mariner Bullpen Lab, is on the mound, it’s no different. Deciphering which alter ego of Vargas will prevail will ultimately decide whether or not the Mariners acquired their next relief ace or just another journeyman reliever.