With the unofficial second half of the season starting on Thursday, it’s time to put up or shut up for a few NBA head coaches.

For some, that means fixing a dysfunctional locker room, and for others it means just getting into the playoffs or simply breaking the status quo and beating expectations.

In a league which doubles as a reality TV show, the seat gets hot fast. Frank Vogel went from perfectly safe to out of a job last season because the Indiana Pacers lost a playoff series in which they were heavy underdogs. Certainly, there will be more firings this season that come out of nowhere, and some coaches should be watching their backs already.

At this time of year, if you can’t put up, you’ll be put out of a job. Without further ado, here are four coaches whose seats are scorching.