Getty Dwayne Johnson Opens Up About Portraying Mark Kerr in Biopic Dwayne Johnson recently spoke about portraying UFC Hall of Famer Mark Kerr in his upcoming biopic, The Smashing Machine . A24 produced the film, which is scheduled for a theatrical release on Oct. 2. Johnson, known for his action roles, has taken a more dramatic shift in his latest project. The film focuses on the UFC Hall of Famer’s career highs and his battle with addiction. To accurately portray Kerr, The Rock underwent a