Job security for head coaches in the NFL can be a tenuous thing.
Most folks would probably consider Andy Reid of the Kansas City Chiefs to be the most secure head coach in the league, but even he was let go by the Philadelphia Eagles in 2012.
There are more than a few head coaches who enter the 2023 campaign standing on rather thin ice. Some haven't been able to meet the lofty expectations of teams with annual Super Bowl aspirations. Others have had success in the regular season but haven't been able to win when it matters most.