When is Mary Spencer vs. Mikaela Mayer?

Mary Spencer vs. Mikaela Mayer is on Thursday, October 30. The U.S. broadcast will start at 8 p.m. ET (midnight GMT) while the Canadian broadcast kicks off at 6:30 p.m. ET (10:30 p.m. GMT).

Mary Spencer vs. Mikaela Mayer will air in the United States on Top Rank Classics, a channel found on services such as Roku, Tubi, Vizio and Pluto TV. Canadian viewers can also watch on the boxing website Punching Grace.

Where is Mary Spencer vs. Mikaela Mayer?

The fight is taking place at the Casino de Montreal in Montreal, Quebec, Canada.

Who is Mary Spencer?

Spencer, 10-2 (6 KOs), is the WBA junior middleweight titleholder — the vacant WBC and WBO titles will also be on the line given Cecilia Braekhus’ retirement.

As an amateur, Spencer represented Canada in the 2012 Olympics, making it to the quarterfinal round of the middleweight tournament. She remained in the unpaid ranks for years after and is a late arrival to professional prizefighting; the 40-year-old only turned pro about four years ago. That meant Spencer needed to be moved quickly. In June 2022, after nearly 10 months in the pros, she scored a first-round technical knockout of former titleholder Chris Namus. She did the same thing to former title challenger Cynthia Lozano that September. 

Spencer then took on the more experienced Femke Hermans, losing a unanimous decision in December 2022. Their rematch took place in October 2023 and had the vacant IBF belt on the line. Hermans won again, this time via majority decision. Spencer has won three fights since then. The second of them was a unanimous decision over the 7-2-1 Naomi Mannes in September 2024 for the WBA’s interim belt. Spencer was upgraded when primary titleholder Terri Harper vacated and moved down to lightweight. For Spencer’s first defense, she won a wide decision in April versus the 31-5-1 Ogleidis Suarez.

Spencer will be the naturally bigger fighter against Mayer, but Mayer brings far more experience against upper-tier opposition.

Who is Mikaela Mayer?

Mayer, 21-2 (5 KOs), held two titles at junior lightweight and currently has one belt at welterweight. She’s moving up to junior middleweight to challenge Mary Spencer but plans to return to 147lbs afterward.

Mayer, a 35-year-old who lives in Colorado Springs, competed in the 2016 Olympics. She turned pro in 2017, picked up a vacant world title in 2020 and unified a pair of belts in 2021. After losing via narrow split decision to Alycia Baumgardner in a 2022 fight for three world titles at 130, Mayer moved up in weight. She made one appearance apiece at lightweight and junior welterweight before arriving at welterweight in January 2024 and losing another disputed split decision to then-IBF titleholder Natasha Jonas.

In her second welterweight title shot, however, Mayer unseated Sandy Ryan for the WBO belt via majority decision. That September 2024 battle was memorable for the leadup as well as the sensational action: An assailant threw a can of paint on Ryan as she left her hotel for the arena, leaving her visibly stunned. Mayer and Ryan had a rematch this past March, which Mayer won by unanimous decision.

The remaining three titles at 147lbs belong to Lauren Price.

“I couldn’t get the undisputed fight with Lauren Price, so rather than take an easy touch, I looked for the next best challenge,” Mayer said when this bout with Spencer was announced. “Beating Mary Spencer at 154lbs will make me a three-division world champion, and although I may be on the smaller side, I have the necessary skills and experience. I’ll dethrone Mary and then head back down to welterweight to challenge Price. I will be stronger, sharper, and better than ever.”

What other fights are on the undercard of Mary Spencer vs. Mikaela Mayer?

The undercard features several prospects at various stages of development. Super middleweight Wilkens Mathieu, 14-0 (10 KOs), will face Shakeel Phinn, 27-3-2 (17 KOs). Junior welterweight Arthur Biyarslanov, 19-0 (16 KOs), will take on Sergey Lipinets (18-4-1, 13 KOs).  Light heavyweight Mehmat Unal, 13-0 (11 KOs), will step in with Ralfs Vilcans, 18-2 (7 KOs). And welterweight Christopher Guerrero, 15-0 (9 KOs), will meet Williams Andres Herrera, 17-4 (7 KOs).

The full list of undercard fights can be seen on BoxRec.

David Greisman, who has covered boxing since 2004, is on Twitter @FightingWords2. David’s book, “Fighting Words: The Heart and Heartbreak of Boxing,” is available on Amazon.