That's precisely what happened to former Denver Broncos coach Nathaniel Hackett, was fired 15 games into his first season as Broncos coach with the team at 4-11 and with the lowest-scoring offense in the league at 15.5 points per game. It was the shortest tenure for any non-interim head coach in franchise history.
Hackett served as the Green Bay Packers' offensive coordinator from 2019 to 2021, and his success with QB Aaron Rodgers largely helped the former land his first NFL head coaching position.
Arod spoke off on the firing of his former offensive coordinator during his latest appearance on The Pat McAfee Show.
Hackett should probably get another opportunity to coach again as an assistant in the NFL, but his short time as a head coach puts him in rare company.