The Buffalo Sabres hired Phil Housley, who spent the past four seasons as an assistant with the Nashville Predators, as coach on June 15. He replaced Dan Bylsma, who was fired after coaching 164 games for the Sabres.
There is a way to measure the impact of a coaching change by comparing how a coach's teams have performed in the standings, minus expectations. As explained in my 2013 book "Hockey Abstract," these expectations can be set in a variety of ways, most simply by taking the team's points from the previous season regressed 35 percent toward the NHL average.
From this perspective, Bylsma, who als coached 401 games for the Pittsburgh Penguins, has added an average of 6.7 points per season to the standings, second among last season's coaches to Bruce Boudreau of the Minnesota Wild (9.8).
Housley has never been a coach in the NHL.