PFL 4: 2023 Regular Season was a mixed martial arts event that took place on Thursday, June 8, 2023 at the Overtime Elite Arena in Atlanta, Georgia.

PFL 4 was a mixed martial arts event produced by the Professional Fighters League that took place on June 8, 2023, at the Overtime Elite Arena in, Atlanta, Georgia, United States. In the main event, 2022 featherweight champion Brendan Loughnane faced Jesus Pinedo.

The PFL 5 mixed martial arts event for the 2022 season of the Professional Fighters League was held on June 24, 2022 at the Overtime Elite Arena in Atlanta, Georgia. This marked the fifth regular season event of the tournament and included fights in the Heavyweight and Featherweight divisions.