See what happens when Marshawn Lynch & Rob Gronkowski battle in 'Mortal Kombat' on Conan

With the Super Bowl just a few days away, two players have already battled -- off the field -- in "Mortal Kombat."

Seattle Seahawks running back Marshawn Lynch is making a guest appearance on Conan O'Brien's late-night talk show this Thursday.

Beast Mode is joined by New England Patriots tight end Rob Gronkowski for a segment called "Clueless Big Game Showdown."

The clip posted Wednesday on YouTube shows the players playing a video game, but things quickly take a hilarious turn.