Canada High: Mikaela Mayer Wins Unified Super Welterweight Crown Mayer is now a three-weight world champion MONTREAL, Canada (Oct. 30, 2025) — Mikaela Mayer traveled to enemy territory and is coming back to America as a three-belt world champion. Mayer defeated Canada’s Mary Spencer via one-sided unanimous (100-90 and 98-92 2x) to capture the WBA, WBC, and

Weigh-In Results: Mary Spencer vs. Mikaela Mayer TOMORROW at 8 p.m. ET/5 p.m. PT LIVE on Top Rank Classics FAST Channel Montreal Casino (Montreal, Canada) (Top Rank Classics FAST Channel, 8 p.m. ET/5 p.m. PT)    • Mary Spencer 152.8 lbs vs. Mikaela Mayer 151 lbs(Spencer’s WBA Super Welterweight World Title and Vacant WBC & WBO Titles — 10 Rounds) • Wilkens Mathieu 167.6 lbs vs. Shakeel Phinn 166.9 lbs(NABF & WBC