Matt has been retired from the world of professional fighting for some time, and that's in part thanks to a severe head injury he sustained when his truck was hit by a train in 2017. After the accident, Matt was in a medically induced coma for 19 days and suffered Grade 3 diffuse axonal injury, which is better known as a brain bleed. For a time, it was unclear if he would survive.

“I had the worst brain injury possible,” Matt said during an interview with MMA Junkie. He survived the accident, but he had to relearn how to function at every level, including how to talk, how to walk, and all the other basic functions he once had. As of last year, Matt was still engaged in regular physical and cognitive therapy to improve his condition, a process that is likely to take him years.