Boston 1, Detroit 0 (13:42, 1st period)
The Bruins struck first when Charlie Coyle skated to the slot, then sent a wrister in through traffic for his second goal of the season.
Boston 2, Detroit 0 (11:53, 2nd period)
Brad Marchand, who made his season debut for the Bruins on Thursday, fired a shot from the left faceoff circle on the power play, extending Boston's lead to a pair.
Detroit 1, Boston 2 (18:49, 2nd period)
After Filip Hronek's initial shot was blocked, Erne grabbed the loose puck and converted a shot from the high slot for his second goal of the season.