Oscar Valdez (29-0, 23 KOs) is set to make the first defense of his WBC junior lightweight title against Top Rank stablemate, three-time Brazilian Olympian and 2016 Olympic gold medalist Robson Conceicao (16-0, 8 KOs) in the controversial main event of a Top Rank Boxing on ESPN+ card on Friday (ESPN+, 10 p.m. ET) at the AVA Amphitheater at Casino Del So…
