Early career Clark started his professional MMA career on August 24, 2013, and made his debut in Knockout Events: Battle at the Chip. He had his first win over Jeremy Spelts via TKO (punches) on round one. One year later, after his first professional win, he made a move to compete in
Resurrection Fighting Alliance 17 on August 22, 2014. He faced Aaron Brown and secured a win via TKO (punches) on round two. On February 7, 2015, Clark joined Total Fight Challenge promotion for his third fight and faced William Vincent. He secured a win via submission (rear-naked choke). Clark returned to
Resurrection Fighting Alliance promotion (RFA). He faced Jaquis William on RFA 25 on April 10, 2015, outworked William and won the fight via unanimous decision. Clark faced Dervin Lopez on RFA 29: USA vs Brazil on August 21, 2015. He won the fight via unanimous decision. On April 15, 2016
Dana White,
Matt Serra and
Robbie Lawler attended
Resurrection Fighting Alliance 39 event at
Sioux Falls, South Dakota for "Dana White Looking For a Fighter", a UFC web series program,
Ultimate Fighting Championship Clark made his UFC debut against
Alex Nicholson in a Middleweight bout on July 13, 2016, at
UFC Fight Night 91. He lost the fight via knockout in the first round. Clark, replacing
Jake Collier, moved back to the Light Heavyweight division and faced
Josh Stansbury on December 3, 2016, at
The Ultimate Fighter 24 Finale. He won the fight via unanimous decision. Clark next faced
Jake Collier on April 15, 2017, at
UFC on Fox 24. He won the fight via unanimous decision. In post fight interviews, Clark admitted that he was disappointed in his performance as he stated he missed opportunities to finish the fight. Clark faced
Jan Błachowicz on October 21, 2017, at
UFC Fight Night 118. He lost the fight via rear-naked choke submission in the second round. Clark faced
Mike Rodríguez on April 7, 2018, at
UFC 223. He won the fight by unanimous decision. Clark faced
Aleksandar Rakić on December 8, 2018, at
UFC 231. He lost the fight via TKO in the first round. Clark was expected to face
Abdul-Kerim Edilov on April 20, 2019, at
UFC Fight Night 149. However, Edilov's removal from the card for undisclosed reasons was announced on 25 March and he was replaced by Ivan Shtyrkov. However, on April 20, 2019, it was reported that the bout was cancelled after Shtyrkov was hospitalized. Soon after the previous fight was canceled, it was announced that Clark would face
Darko Stošić at
UFC Fight Night: Gustafsson vs. Smith on June 1, 2019. He won the fight via unanimous decision. Clark faced
Ryan Spann on October 12, 2019, at
UFC Fight Night 161. He lost the fight via submission in round two. Clark was scheduled to face
Gadzhimurad Antigulov on February 15, 2020, at
UFC Fight Night 167. However, Antigulov was pulled from the event for undisclosed reason and he was replaced by
Dequan Townsend. He won the fight by unanimous decision. Clark was scheduled to face
Alonzo Menifield on May 2, 2020, at
UFC Fight Night: Hermansson vs. Weidman. However, on April 9,
Dana White, the president of UFC announced that this event was postponed and the bout took place on June 6, 2020, at
UFC 250. Clark won the fight via unanimous decision. Clark was briefly linked to a bout against
Shamil Gamzatov on November 28, 2020, at
UFC on ESPN 18. However, Gamzatov was removed from the bout in mid-October due to alleged
visa issues. Clark faced
Anthony Smith on the card as the main event after
Curtis Blaydes had to pull out of his fight against
Derrick Lewis due to a positive COVID test. He lost the fight via a triangle choke submission in the first round. Clark was scheduled to face
Ion Cuțelaba on May 1, 2021, at
UFC on ESPN 23. However, Clark pulled out from the event, citing injury, and he was replaced by
Dustin Jacoby. The bout eventually took place on September 18, 2021, at
UFC Fight Night 192. After being knocked down in round one, he lost the fight via unanimous decision. Clark faced
William Knight on April 16, 2022, at
UFC on ESPN 34. He won the fight via technical knockout in round three. Clark faced
Azamat Murzakanov on August 13, 2022, at
UFC on ESPN 41. He lost the fight via technical knockout in round three. Clark faced
Da Un Jung on February 4, 2023, at
UFC Fight Night 218. He won the fight via unanimous decision. Clark faced
Kennedy Nzechukwu on May 6, 2023, at
UFC 288. He lost the bout via technical guillotine choke in second round. Clark faced
Marcin Prachnio on February 10, 2024, at
UFC Fight Night 236. He lost the bout by unanimous decision. On February 14, 2024, it was reported that Clark was removed from the UFC roster.
Global Fight League Clark was scheduled to face former
UFC Light Heavyweight Championship challenger
Thiago Santos on May 25, 2025 at GFL 2. However, all GFL events were cancelled indefinitely. ==Championships and accomplishments==