The PFL 4 mixed martial arts event for the 2021 season of the Professional Fighters League was held on June 10, 2021. This was the fourth regular season event of the tournament and included fights in the Featherweight and Lightweight divisions. Boxing champion and Olympic gold medalist Claressa Shields made her MMA debut in the main event against Brittney Elkin.

The PFL 4 mixed martial arts event for the 2022 season of the Professional Fighters League was held on June 17, 2022 at the Overtime Elite Arena in Atlanta, Georgia. This marked the fourth regular season event of the tournament and included fights in the Lightweight and Light Heavyweight divisions.

PFL 3: 2023 Regular Season was a mixed martial arts event that took place on Friday, April 14, 2023 at the Theater at Virgin Hotels in Las Vegas, Nevada.

UFC 206: Holloway vs. Pettis was a mixed martial arts event produced by the Ultimate Fighting Championship (UFC) held on December 10, 2016, at the Air Canada Centre in Toronto, Ontario, Canada. A featherweight bout between Max Holloway and former UFC Lightweight Champion Anthony Pettis was shifted to the headlining spot after numerous fights fell through.

PFL 4: 2023 Regular Season was a mixed martial arts event that took place on Friday, June 23, 2023 at the Overtime Elite Arena in Atlanta, Georgia.

PFL 9 was a mixed martial arts event produced by the Professional Fighters League that took place on August 23, 2023, at The Theater at Madison Square Garden in New York City, New York, United States. The event was headlined by a lightweight playoff bout between Clay Collard facing off against Shane Burgos in an attempt to reach the lightweight final.

The PFL 7 mixed martial arts event for the 2021 season of the Professional Fighters League was held on August 13, 2021. This was the start of the playoffs for the Welterweight and Lightweight divisions. This event aired on ESPN2, with the prelims on ESPN+.

The PFL 7 mixed martial arts event for the 2022 season of the Professional Fighters League was held on August 5, 2022, at the Hulu Theater in New York City, New York, United States. This event marked the start of the playoffs for the Light Heavyweight and Lightweight divisions.

The PFL 10 mixed martial arts event for the 2022 season of the Professional Fighters League will be held on November 25, 2022, at the Hulu Theater in New York City, New York, United States. This will be the finale of the playoffs for all divisions, with the winners getting $1 million cash prize. The event also will also mark the organization's first pay-per-view card, being available on ESPN+ PPV.