Overview
- Mayer won a unanimous decision to take Spencer’s WBA belt and the vacant WBC and WBO titles at 154 pounds, becoming a three-division champion.
- She remains the WBO welterweight titleholder, giving her active championships in two weight classes.
- Coverage highlighted Mayer’s relentless pressure, with a notable Round 8 right hand that appeared to stagger Spencer.
- Her next steps include an IBF title bid at 154 against belt-holder Oshae Jones or a return to 147 for a showdown with unified champion Lauren Price.
- The WBC and WBO belts were available after Cecilia Brækhus retired, and the bout topped a Top Rank card in Montreal.