Robert Boyd Holbrook is an American actor. He has starred in the Netflix series Narcos as DEA agent Steve Murphy and The Sandman as the Corinthian, as well as in the History miniseries Hatfields& McCoys as "Cap" Hatfield. He starred as Billy in The Skeleton Twins, Peter Kristo in A Walk Among the Tombstones, Donald Pierce in Logan, Quinn McKenna in The Predator, Pinkins in O.G., Thomas Lockhart in In the Shadow of the Moon, Ty Shaw in Vengeance, and Clement Mansell in Justified: City Primeval.