‘From 2006 through 2024, 21 coaches were promoted from an assistant role to take over the team with whom they were employed the previous season. Their combined record and winning percentage: 360-472 (.432). Eleven lasted fewer than three seasons. Only one, Jim Caldwell of the Indianapolis Colts, reached a Super Bowl, and he accomplished the feat during his first season. Three remained on the job for more than three seasons. Five had experience as an NFL head coach.’