BAMMA USA: BAD BEAT 4 was held Friday, January 13, 2012, at the Commerce Casino in Commerce, California. Seemingly appropriate for an event being held on Friday the 13th, the main event had to be canceled at the last minute.
Former UFC lightweight Gabe "Godzilla" Ruediger was supposed to fight in the main event, however, his opponent Musa Toliver, who took the fight on less than a week's notice, suffered a rib injury while training and pulled out of the fight on Friday. Toliver had originally replaced Brandon Anderson, who actually fought on this card, but was rejected by the California State Athletic Commission as opponent for Ruediger. As Ruediger himself put it on his Facebook page, "The commission pulled anderson because he is bad. He fought last night...and got tapped by 6-19 bobby sanchez."