Parkin acquired a record of 5-0 competing on the UK regional scene winning all five fights by stoppage inside of two rounds.[2]
Dana White's Contender Series
Parkin was then booked to compete on Week 5 of Season 6 of Dana White's Contender Series on August 23, 2022, against fellow undefeated prospect Eduardo Neves.[3] He would win the fight via first round submission and was awarded a contract by Dana White.[4]
Ultimate Fighting Championship
After earning his contract, Parkin made his UFC debut at UFC Fight Night 224 against Jamal Pogues on July 22, 2023.[5] He won the fight via unanimous decision. This would mark the first time in his career that he had gone to the scorecards.[6]
Parkin would next face Caio Machado at UFC Fight Night 232 on November 18, 2023.[7] He won the fight via unanimous decision.[8]
Parkin was then scheduled to face TUF 30 Heavyweight Winner Mohammed Usman at UFC on ESPN 53 on March 23, 2024.[9] Parkin would remain undefeated, winning once again by unanimous decision.[10]
Parkin's next fight was against Ľukasz Brzeski at UFC 304 on July 27, 2024.[11] He won the fight via first-round knockout, marking his first stoppage victory inside the UFC.[12] This win earned him the Performance of the Night award.[13]