Dwayne Johnson is playing MMA and UFC fighter Mark Kerr in the biopic "The Smashing Machine."Johnson looks unrecognizable in the movie, appearing to wear a wig and prosthetics."The Smashing Machine," written and directed by Benny Safdie,

Dwayne Johnson stars as former wrestler and UFC star Mark Kerr in a new trailer for Benny Safdie's "The Smashing Machine."

Dwayne Johnson undergoes his most dramatic on-screen transformation yet in the first trailer for “The Smashing Machine,” a biopic about two-time UFC heavyweight champ Mark Kerr. A24 pulled the curtain back on the drama Tuesday morning.