[2] Born and raised in Rosemount, Minnesota, began competing in wrestling from a young age and was also a fan of boxing and mixed martial arts.

Richman attended Rosemount High School where he competed in wrestling before joining the United States Marine Corps upon graduating.

After serving three tours as an infantryman in Iraq and reaching the rank of Sergeant, Richman began training in mixed martial arts in 2008.

[3] Richman made his professional debut in 2008 and compiled an undefeated record of 8-0 before competing on The Ultimate Fighter: Team GSP vs.

In his opening bout to get into the house, Richman lost to Aaron Wilkinson by unanimous decision after two rounds.

Richman proved he was the superior fighter in his Bellator 88 Featherweight Tournament Quarterfinal bout against Mitch Jackson.

Richman dominated Jackson on his feet, dropping him three times with short left hooks.

Richman faced Magomedrasul Khasbulaev in the Bellator Featherweight Tournament Final on April 4, 2013 in Atlantic City.

[9] Richman had been in trouble early in the fight, but floored Stepanyan with a left hook in the first round.

He tested positive for performance-enhancing drugs according to CSAC Executive Director Andy Foster and will be suspended two years and fined $2,500 for the rule infraction.

Richman made his Bare Knuckle Fighting Championship debut against Marcel Stamps on April 30, 2021 at BKFC 17.

[27] Richman came out of retirement to face Erick Lozano on April 12, 2024 at BKFC Fight Night Clearwater in the main event.