Marshawn Lynch & Rob Gronkowski Play 'Mortal Kombat X' with Conan O'Brien

Before they face off on the gridiron this Sunday, Seattle Seahawks star running back Marshawn "Beast Mode" Lynch and New England Patriots tight end Rob Gronkowski battled on another playing field. Conan O'Brien recently flew down to Arizona to pit the two NFL stars against one another in the yet-to-be-released Mortal Kombat X, airing their "Clueless Gamer" PlayStation 4 battle on last night's episode of his eponymous show. Naturally, hilarity ensued as the two squared off for a severed head-topp...