One of the hallmarks of sustained success in pro sports is having a solid working relationship between the main club and the feeder clubs. In the case of the NHL, that means a good relationship between the AHL and the NHL.
The Bruins are one of the more geographically blessed NHL franchises, with their farm team just an hour south on 95. They also benefit from having a head coach (Bruce Cassidy) who also coached the AHL affiliate, and from having a number of players who have bounced back and forth in recent years, including Danton Heinen, Austin Czarnik and Kenny Agostino.