Jai Opetaia announced on social media that he has vacated his IBF cruiserweight title after the organization ruled he must next face mandatory challenger Mairis Briedis in a rematch. Instead, Opetaia (23-0, 18 KOs) will proceed with a fight vs. Ellis Zorro on Saturday’s stacked card in Riyadh, Saudi Arabia, headlined by Anthony Joshua and Deontay Wilder in separate fights. “I fought through absolute agony to win that belt and it saddens me to relinquish it,” Australia’s Opetaia said. “But the fact is, Briedis isn’t ready to fight on Dec. 23 and I need to stay active. I simply can’t turn down […]