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 1 mixed martial arts event for the 2021 season of the Professional Fighters League was held on April 23, 2021. This was the first regular season event of the tournament and included fights in the Featherweight and Lightweight divisions. The event was headlined by a lightweight clash between the former UFC and WEC Lightweight champion Anthony Pettis and the UFC veteran Clay Collard.

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 3 mixed martial arts event for the 2024 season of the Professional Fighters League was held on April 29, 2024, at the Wintrust Arena in Chicago, Illinois, United States.

PFL 6 was a mixed martial arts event for the 2024 season of the Professional Fighters League was held on June 28, 2024, at the Sanford Pentagon in Sioux Falls, South Dakota, United States.

PFL 9 was a mixed martial arts event for the 2024 season of the Professional Fighters League was held on August 23, 2024, at The Anthem in Washington, D.C., United States.

The Ultimate Fighter 27 Finale (also known as The Ultimate Fighter: Undefeated Finale) was a mixed martial arts event produced by the Ultimate Fighting Championship that was held on July 6, 2018, at the Pearl Theatre in Paradise, Nevada, part of the Las Vegas metropolitan area. The featherweight and lightweight finals of The Ultimate Fighter: Undefeated took place at the event. A middleweight bout between Brad Tavares and Israel Adesanya headlined the event.