Bill Algeo

Ultimate Fighting Championship Algeo made his UFC debut, as a short notice replacement for Ryan Hall, against Ricardo Lamas on August 29, 2020, at UFC Fight Night: Smith vs. Rakić. He lost the fight via unanimous decision. This fight earned him the Fight of the Night award.

Algeo faced Spike Carlyle at UFC on ESPN: Smith vs. Clark on November 28, 2020. He won the bout via unanimous decision.

Algeo was scheduled to face Ricardo Ramos on April 17, 2021, at UFC on ESPN: Whittaker vs. Gastelum. However, Ramos was pulled from the fight during the week leading up to the event due to COVID-19 protocols. The bout was cancelled, and was rescheduled for UFC Fight Night: Font vs. Garbrandt. Algeo lost a close bout via unanimous decision. Seven MMA media outlets gave it to Ramos and six media outlets gave it to Algeo.

Algeo faced Joanderson Brito on January 15, 2022, at UFC on ESPN 32. He won the fight via unanimous decision.

Algeo was scheduled to face Billy Quarantillo on July 16, 2022, at UFC on ABC 3. However, after Quarantillo pulled out due to injury, Algeo was booked against Herbert Burns. He won the fight via TKO in the second round after Burns was unable to return to his feet. This win earned Algeo his first Performance of the Night bonus award.

Algeo faced Andre Fili on September 17, 2022, at UFC Fight Night 210, after Fili's original opponent, Lando Vannata, pulled out due to injury. He lost the fight via split decision.

Algeo faced T.J. Brown on April 15, 2023, at UFC on ESPN 44. He won the fight via a rear-naked choke submission in the second round. This fight earned him his second Fight of the Night award.

Algeo faced Alexander Hernandez on October 7, 2023, at UFC Fight Night 229. He won the fight via unanimous decision.

Algeo faced Kyle Nelson on March 30, 2024, at UFC on ESPN 54. He lost the fight via technical knockout in round one.

Algeo faced Choi Doo-ho on July 20, 2024, at UFC on ESPN 60. He lost the fight by technical knockout in the second round.

On February 11, 2025, Algeo announced his retirement from competition.

Professional grappling career

Algeo was booked to compete against Andrew Kochel at Fury Pro Grappling 7 on May 27, 2023. He lost the match by submission, a straight ankle-lock.

Championships and accomplishments Ultimate Fighting Championship Fight of the Night (Two times)