When the St. Louis Blues relieved Mike Yeo of his duties in mid-November of 2019, it was not as though they were shaking the foundations of history. This was not the first time a coach had been let go once a season began and, in fact, not even the first time the Blues or Doug Armstrong even had done it.
In fact, the Blues have done it six times since the century began in the year 2000. Each time there was moderate to solid success, giving the franchise the opinion it had made the right decision.
When the Blues did it this most recent time, nobody knew what affect it would have on a team that was floundering near the league bottom despite several key offseason additions over the last few summers.