Rob Kaman Mark Jason Miller[1] (born September 17, 1971) is a retired American kickboxer who competed in the heavyweight division.

Miller grew up in Latrobe, Pennsylvania and became involved with martial arts through his love of Bruce Lee and Chuck Norris films.

[3] Mark Miller made his debut in the K-1 promotion in August 2000 at K-1 USA Championships 2000, where he lost to Tommy Glanville via unanimous decision, suffering his first loss as a professional.

Miller's memoir Pain Don't Hurt: Fighting Inside and Outside the Ring was published in July 2014 by Ecco Press, an imprint of HarperCollins curated by chef and author Anthony Bourdain.

The book, co-written with Miller's girlfriend at the time, Shelby Jones, tells of his origins in a troubled family, heart surgery, struggles with addiction, and his kickboxing career.