June 30: Mayer, Conceicao, and Alvarado Headline Oklahoma City Undercard
OKLAHOMA CITY (June 15, 2018) — Former WBO junior welterweight champion Mike Alvarado, female fighting sensation Mikaela Mayer, and 2016 Olympic gold medalist Robson Conceicao will see action on the June 30 undercard at the Chesapeake Energy Arena in Oklahoma City. The card will be headlined by WBO super middleweight champion Gilberto “Zurdo” Ramirez’s title …