• UFC Fight Night(3/28/26) Simon and Adrian Yanez fought to a majority draw
• UFC Fight Night(11/8/25) Simon lost a three round unanimous decision to Raoni Barcelos
• UFC on ESPN(6/14/25) Simon won a three round unanimous decision over Cameron Smotherman
• UFC Fight Night(2/22/25) Simon knocked out Javid Basharat at 3:58 of the first round
• UFC 303(6/29/24) Simon lost a three round unanimous decision to Vinicius Oliveira
• UFC Fight Night(1/13/24) Simon lost a three round unanimous decision to Mario Bautista
• UFC on ESPN(4/29/23) Simon was stopped by Song Yadong via strikes at 1:10 of the fifth round
• UFC on ABC(7/16/22) Simon submitted Jack Shore via arm triangle choke at 3:28 of the second round
• UFC Fight Night(12/18/21) Simon knocked out Raphael Assuncao at 2:14 of the second round
• UFC 258(2/13/21) Simon won a three round unanimous decision over Brian Kelleher
• UFC on ESPN(1/20/21) Simon submitted Gaetano Pirrello via arm triangle choke at 4:00 of the second round
• UFC Fight Night(5/13/20) Simon won a three round split decision over Ray Borg
• UFC on ESPN(12/7/19) Simon lost a three round unanimous decision to Rob Font
• UFC Fight Night(7/13/19) Simon was stopped by Urijah Faber via strikes at :46 of the first round
• UFC 234(2/10/19) Simon won a three round unanimous decision over Rani Yahya
• UFC 227(8/4/18) Simon won a three round unanimous decision over Montel Jackson
• UFC Fight Night(4/21/18) Simon submitted Merab Dvalishvili via guillotine choke at 5:00 of the third round
• Dana White's Contender Series, Season 1
• Week 5(8/8/17) Simon won a three round split decision over Donavon Frelow