Dwayne Johnson Transforms as Mark Kerr in ‘The Smashing Machine’

Dwayne “The Rock” Johnson has undergone a remarkable transformation to portray mixed martial artist Mark Kerr in the upcoming biographical sports drama, The Smashing Machine. Johnson dedicated significant time to his appearance, spending up to three hours daily in makeup to apply over a dozen prosthetics. In an interview with Vanity Fair in August 2025, he described the process as a deep dive into Kerr’s life, stating, “By the time I got to set, I was Mark Kerr… If Emily [Blunt] and I weren’t best friends, I don’t know that we could’ve gone to the places we went to.”

Johnson’s performance has garnered significant attention, with many highlighting his commitment to capturing the essence of Kerr. Ryan Bader, a co-star and fellow MMA fighter, noted Johnson’s remarkable dedication. “He walked like Mark Kerr, he talked like Mark Kerr,” Bader shared with Us Weekly in October 2025. “He was in his own head. Thousand-yard stare. It felt real. This man feels like he’s about to go fight.” The portrayal has sparked discussions about potential awards recognition, including Oscar buzz.

Mark Kerr’s Life and Legacy

Mark Kerr, born in Ohio, is a retired MMA fighter and wrestler, whose career began in the late 1990s. He made his MMA debut in 1997 at the World Vale Tudo Championship 3, where he earned the nickname “The Smashing Machine” after defeating three opponents with his aggressive fighting style. Kerr’s record stands at 15 wins and 11 losses, and he participated in two UFC Heavyweight Tournaments before retiring in 2009.

Kerr’s impact on the sport was recognized in June 2025 when he was inducted into the UFC Hall of Fame. Dwayne Johnson had the honor of presenting him with the award at a ceremony in Las Vegas.

Kerr was previously married to Dawn Staples in 2000, with whom he shares a son, Bryce. The couple divorced in 2006, a situation exacerbated by Kerr’s struggles with substance abuse, which he has openly discussed. Staples, a former Playboy model and real estate investor, is portrayed by Blunt in The Smashing Machine. She attended the film’s premiere at the Toronto Film Festival in September 2025, sharing her excitement on social media.

Challenges and Recovery

In 2016, Kerr disclosed his battle with peripheral neuropathy, a condition that affects the peripheral nerves, causing weakness and pain. According to the Mayo Clinic, this condition can impair various bodily functions, including digestion.

Kerr has been candid about his past substance abuse issues, admitting they strained his marriage. “What I was doing at the time was incredibly selfish,” he reflected in a September 2025 interview with Time Magazine. “Dawn just wanted my love. A lot of that volatility was because of my actions.” He recounted how painkillers became a coping mechanism for the physical toll of competitive fighting.

After retiring, Kerr focused on sobriety, motivated in part by his desire to be a better father. “I’ve been sober for seven years now,” he stated. “It took my son saying, ‘Dad, do you think you can stop drinking?’”

Today, Kerr is married to Franci Alberding, with whom he founded a wellness company offering fitness and coaching programs. Their partnership underscores a new chapter in his life, emphasizing health and recovery.

For those struggling with substance abuse, resources like the Substance Abuse and Mental Health Services Administration (SAMHSA) provide support, encouraging individuals to seek help.