Early career Brown began his professional fighting career in 2014, making his professional debut at Ring of Combat 48. Brown won the fight against Steve Tyrrell via submission in round one. He trains out of Budokan Martial Arts Academy, a
Renzo Gracie BJJ affiliate.
Ring of Combat Brown had 6 fights in the promotion winning all 6 by stoppage in the first or second round. He won the Ring of Combat welterweight belt by beating Mike Winters by second-round TKO.
Ultimate Fighting Championship Brown was featured on ''Dana White's Looking For A Fight'' where he knocked out Robert Plotkin at Ring of Combat 53. He was signed to the UFC soon after. Brown won the fight via unanimous decision. Brown faced
Michael Graves on April 16, 2016, at
UFC on Fox 19. He lost the fight via submission in the second round. Brown returned to face Erick Montaño on September 17, 2016, at
UFC Fight Night 94. He won the fight via submission in the third round. Brown was expected to face promotional newcomer
Charlie Ward on December 9, 2016, at
UFC Fight Night 102. However, Ward was pulled from the event due in early November due to alleged
visa issues which restricted his travel and was replaced by fellow newcomer
Brian Camozzi. Brown won the fight via TKO in the second round. Brown was expected to face
George Sullivan on February 11, 2017, at
UFC 208. However, on January 26, Sullivan was pulled from the card after being notified by
USADA of a potential anti-doping violation stemming from an out-of-competition sample collected earlier this year.
Belal Muhammad was the eventual replacement. Brown lost the fight via unanimous decision. Brown faced
Mickey Gall on November 4, 2017, at
UFC 217. He won the fight by unanimous decision. Brown faced
Niko Price on July 14, 2018, at
UFC Fight Night 133. He lost the fight via knockout in the second round after Price landed several hammerfists from the bottom to knock Brown out. Brown was expected to face
Chance Rencountre on January 19, 2019, at
UFC Fight Night 143. However, Brown pulled out of the fight in early January for undisclosed reasons. Brown faced
Bryan Barberena on June 22, 2019, at
UFC Fight Night 154. He won the fight via TKO in the third round. Brown faced
Warlley Alves at
UFC Fight Night 164 on November 16, 2019. He won the fight via a triangle choke submission in the second round. This win earned him the
Performance of the Night award. Brown was scheduled to face
Vicente Luque on April 11, 2020, at
UFC Fight Night: Overeem vs. Harris. Due to the
COVID-19 pandemic, the event was eventually postponed. The bout with Luque was rescheduled and took place on August 1, 2020, at
UFC Fight Night: Brunson vs. Shahbazyan. Brown lost the fight by knockout in the second round. Brown was expected to face
Alex Oliveira on February 27, 2021, at
UFC Fight Night 186. However, Brown pulled out of the fight during the week leading up to the event due to undisclosed reasons. The pair was rescheduled and they eventually met at
UFC 261 on April 24, 2021. Brown won the fight via a one-armed rear naked choke in the first round. Brown faced
Jared Gooden on October 9, 2021, at
UFC Fight Night 194. At the weight-ins, Gooden weighted 174 pounds, three pounds over the limit of non-championship welterweight bouts. The bout proceeded to a catchweight bout. Gooden was fined 20% of his purse and it went to Brown. He won the fight via unanimous decision. Brown faced
Khaos Williams on May 7, 2022, at
UFC 274. He won the fight via split decision. Brown faced
Francisco Trinaldo on October 1, 2022, at
UFC Fight Night 211. He won the bout via unanimous decision. Brown faced
Jack Della Maddalena on February 12, 2023, at
UFC 284 He lost the bout via first round submission. Brown faced
Wellington Turman on June 24, 2023, at
UFC on ABC 5. He won the bout via unanimous decision. Brown was scheduled to face
Muslim Salikhov on December 16, 2023, at
UFC 296. However, the bout was scrapped after Brown withdrew due to illness. The pair was rescheduled to meet at
UFC Fight Night 235 on February 3, 2024. Brown won by first-round knockout with a right-hand punch. This fight earned him the
Performance of the Night award. Brown faced
Elizeu Zaleski dos Santos on June 1, 2024, at
UFC 302. He won the fight by unanimous decision. Brown was reportedly scheduled to face
Carlos Prates on November 16, 2024, at
UFC 309. However, Prates ended up being scheduled to face
Neil Magny at another event instead. Brown faced
The Ultimate Fighter 29 middleweight tournament winner
Bryan Battle on December 7, 2024, at
UFC 310. At the weigh-ins, Battle weighed in at 175 pounds, four pounds over the welterweight non-title fight limit. The bout proceeded at catchweight and Battle was fined 30 percent of his purse which went to Brown. Brown faced
Nicolas Dalby on April 26, 2025, at
UFC on ESPN 66. He won the fight by knockout in the second round. This fight earned him his first
Fight of the Night award. Brown was scheduled to face
Gabriel Bonfim on October 11, 2025, at
UFC Fight Night 261. However, the bout was moved to
UFC Fight Night 264 on November 8, 2025, to serve as the main event. He lost via knockout in the second round. Brown faced
Kevin Holland on April 11, 2026 at
UFC 327. He lost the fight by unanimous decision. ==Professional grappling career==