“The Smashing Machine,” out October 3, comes from writer/director Benny Safdie, who marks his solo film directorial debut with the movie. He is best known for working alongside his brother Josh, co-directing the acclaimed “Uncut Gems,” among other films.

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

Before “The Smashing Machine,” Mark Kerr was a former collegiate wrestler trying to make his way in mixed martial arts.