Bellator 277: McKee vs. Pitbull 2 was a mixed martial arts event produced by Bellator MMA that took place on April 15, 2022, at the SAP Center in San Jose, California, United States.

The event marked the promotion's 12th visit to San Jose and first since Bellator 266 in September 2021.

The event was headlined by a Bellator Featherweight World Championship rematch between current champion A. J. McKee and former two-time champion (also former Bellator Lightweight World Champion) Patrício Pitbull. The duo previously fought in the Bellator 263 main event, where McKee took Pitbull's title in the Bellator Featherweight World Grand Prix final via a first-round guillotine choke submission.

The co-main event featured the final of the Bellator Light Heavyweight World Grand Prix Tournament, as a Bellator Light Heavyweight World Championship bout between current champion Vadim Nemkov and The Ultimate Fighter: Team Edgar vs. Team Penn light heavyweight winner Corey Anderson as well as the $1 million prize.

A heavyweight bout between former interim Bellator Heavyweight World Championship challenger Timothy Johnson and Tyrell Fortune was scheduled for the event. However, on March 1, 2022, it was announced by Bellator that Johnson was expected to face Linton Vassell and Fortune was set to meet Steve Mowry in the event. In turn, Mowry pulled out of the bout in late March and was replaced by Rakim Cleveland.

A middleweight bout between Pat Downey and Daniel Compton was scheduled for this event. However, after developing Red skin syndrome, Downey was forced to pull out of the bout.

A light heavyweight bout between Dovletdzhan Yagshimuradov and Tony Johnson was scheduled for the event. However, due to an injury, Johnson was forced to pull out and was replaced by former Bellator Middleweight Champion Rafael Carvalho.

A featherweight bout between Aaron Pico and Jeremy Kennedy was expected to take place at the event. However, Kennedy withdrew 8 days before the event and Adli Edwards replaced him.