What we learned: Bruins win one for AJ Quetta, sweep Penguins

Without one of the leading goal scorers in the league a year ago and Zdeno Chara and Torey Krug departing for new homes, the Boston Bruins entered their first seven games, hoping to tread water.

Or so we thought.

On a night where they honored Bishop Feehan’s AJ Quetta following his unfortunate collision a couple of days prior, the Bruins improved to 5-1-1 following a convincing two-game sweep over the Pittsburgh Penguins.

Come Saturday, the Bruins may have David Pastrnak’s services again when they travel to Washington to face Chara and the Capitals. In the meantime, here’s what we learned from their 4-1 victory over Sidney Crosby and the rest of the Penguins.

Fourth line sets the tone against…