The PFL 2 mixed martial arts event for the 2018 season of the Professional Fighters League was held on June 21, 2018, at the Chicago Theatre in Chicago, Illinois. It was the second regular season event of 2018 and included only fights in the lightweight and light heavyweight divisions.

The PFL 5 mixed martial arts event for the 2021 season of the Professional Fighters League was held on June 17, 2021. This was the second regular season event of the tournament and included fights in the Welterweight and Light heavyweight divisions. The event was headlined by a welterweight clash between the former UFC title contender and Bellator welterweight champion Rory MacDonald and the former UFC veteran Gleison Tibau.

The PFL 2 mixed martial arts event for the 2021 season of the Professional Fighters League was held on April 29, 2021. This was the second regular season event of the tournament and included fights in the Welterweight and Light heavyweight divisions. The event was to be headlined by a welterweight clash between the former UFC title contender and Bellator welterweight champion Rory MacDonald and the former UFC veteran David Michaud.