20 teams are tied for losing the most games in a Super Bowl, with 1 loss. The first three are the Kansas City Chiefs on February 9, 2025 and on February 7, 2021, the San Francisco 49ers on February 11, 2024, on February 2, 2020 and on February 3, 2013 and the Philadelphia Eagles on February 12, 2023 and on February 6, 2005.