The International Boxing Federation belt in this weight class previously belonged to Joseph Diaz, Jr. who lost the title during the weigh-in before his February fight with Shavkat Rakhimov. The bout ended in a draw and the championship belt remained vacant.
The main event this evening will be a repeatedly postponed duel between Teofimo Lopez and George Kambosos. The boxers will fight for the IBF, WBA, WBO and WBC "franchise" lightweight belts.