The 2017-18 season was a unique time in NHL history. For the first time since the league expanded beyond six teams six decades prior, no coaches were fired during the campaign.



That brief period of serenity did not last. The NHL again is a league where the coaching carousel always feels like a five-game losing streak away from spinning again.



Teams have different reasons for changing coaches. In season, it’s almost always because the club is not meeting expectations and management thinks a new voice could propel the players to better performances. The Blues changed coaches in November 2018, and seven months later they were Stanley Cup champions.



How often does firing the coach during the season actually work? Everyone remembers the big success stories, but what about the moves that didn’t spur the team to a fairytale run?



The Athletic sifted through every in-season coaching change since the 2004-05 lockout ushered in the salary cap...