UFC Vegas 124 undergoes late main-event change

Sean Brady’s reported injury prompted a reported replacement main event of Derrick Lewis-Cortes-Acosta vs. Johnny Walker, with Gabriel Bonfim expected to be rebooked. A new preview favors Cortes Acosta at -190 based on distance striking and Walker’s chin, but gives little supporting technical detail. Round count, official confirmation, final bout order, and logistics remain unclear; Lucas Brennan also withdrew after reporting a full-thickness ACL tear, while Austin Bashi’s status is uncertain.