A featherweight bout at UFC Vegas 110 on November 1 has triggered concerns about betting integrity and prompted major sportsbooks to issue refunds following claims of suspected fight manipulation. Isaac Dulgarian vs. Yadier del Valle saw suspicious movement before the match, and most sportsbooks refunded this bet.
According to MMA journalist Harry Mac on X, federal authorities flagged abnormal betting activity before the event and allegedly notified the UFC hours before the fight. Mac claimed that the FBI identified suspicious line movement and alleged the UFC proceeded despite being given the opportunity to cancel.