Drew Stafford has restored the three-goal lead less than four minutes into the third.
With Kevin Westgarth in the box for an offensive-zone cross-checking penalty, Stafford pounced on a rebound and swept it past Jonathan Bernier for his first goal of the season.
Nathan Gerbe and Derek Roy earned assists on the goal. For Gerbe, it was his second point of the night.
The goal was the first power-play tally Los Angeles has allowed in these first two games.