funbeaten
When a habitually low-performing sports team suddenly, often unexpectedly hits a long winning streak, defeating traditional powerhouse teams. Synonymous with "Cinderella Story."
No one is surprised when Alabama Crimson Tide rolls up football wins season after season, but interest heightens when funbeatens like the 2006 Boise State Broncos or the 2017 UCF Knights shock the nation with a start-to-finish winning record.