Young Bruins centers Poitras and Beecher make opening night roster

Initially Pavel Zacha, Charlie Coyle, Morgan Geekie, and Patrick Brown were considered for center spots.
As preseason progressed, Poitras and Beecher impressed coaches and earned roster spots.
Poitras stood out with confident play and offense, while Beecher's speed, physicality, and linemate compatibility sealed his role.
The two rookies are filling roles vacated by Bergeron and Krejci retirements.
Expectations for their impact should be tempered as they gain experience.