[1] He was scheduled to fight Phonaek Or Kwanmuang in the Prachinburi event in the Omnoi Stadium, in March 2020.
[4] He fought Sorgraw Petchyindee during ONE Championship: No Surrender 2 on August 14, 2020, and lost the bout by split decision.
However, their fight was pulled from the event after the COVID-19 situation in the United Kingdom prevented Harrison from traveling.
[7] Pongsiri faced former ONE Bantamweight Kickboxing World Champion Alaverdi Ramazanov at ONE Championship: NextGen 3 on November 26, 2021.
[12] However, Pongsiri withdraw from the bout due to injury and was replaced by Rambo Petch Por.Tor.Or.