Mat Siscoe holds a commanding 98.9 percent implied probability in this St. Catharines mayoral market following his October 26 election victory, driven by his status as incumbent with a 69 percent win in 2022 and a record emphasizing infrastructure upgrades, stormwater management, and restrained property tax increases. Five challengers, including Ann-Marie Zammit, Jimmy Jackson, and Anthony Adeoye, split remaining support in a low-profile race with no major controversies or polling shifts reported in the final weeks. Early returns on election night showed Siscoe above 61 percent, aligning with trader consensus on the frontrunner's path to re-election. The only realistic challenges at this stage involve formal certification, vote tabulation errors, or an extremely narrow recount margin that has not materialized in available results.