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.

After the first three events in Las Vegas, the series moves to Overtime Elite Arena in Atlanta, with live broadcasts on ESPN and ESPN+.

Wilkinson won his first match of the season against former UFC title challenger Thiago Santos, while Fleury defeated Krzysztof Jotko.

[3] However, a bevy of failed drug tests changed this card as nine PFL fighters were suspended by the Nevada State Athletic Commission included former UFC title challenger Thiago Santos, former PFL heavyweight champion Bruno Cappelozza, Krzystof Jotko, Rizvan Kuniev, Mohammed Fakhreddine, Cezar Ferreira, Will Fleury, Alejandro Flores, and Daniel Torres.

In light of the recent suspensions, Ty Flores stepped in for Will Fleury to fight Rob Wilkinson in a light heavyweight match, but Wilkinson subsequently failed a drug test and was replaced by Dan Spohn;[5] Tyler Diamond replaced Daniel Torres against Movlid Khaybulaev in a featherweight bout; Gabriel Braga replaced Alejandro Flores to fight Marlon Moraes in another featherweight bout; Taylor Johnson and UFC veteran Andrew Sanchez joined the light heavyweight season to replace the suspended fighters and faced each other; Impa Kasanganay and Tim Caron, new additions to the light heavyweight season, competed against each other; and a scheduled feature fight between Thiago Santos and Mohammed Fakhreddine was cancelled.