Maxim Lapierre and Vladimir Tarasenko scored in the first period and the Blues went on to edge the Senators 3-2 in Ottawa. Alexander Steen lit the lamp in the second for St. Louis, which put the brakes on a two-game skid. Brian Elliott made 24 saves in the victory. Mika Zibanejad and Erik Karlsson each had power-play goals for Ottawa, which has dropped five-of-seven. Robin Lehner stopped 30 shots in the loss.