Pittsburgh was shut out 1-0 on Saturday, stoned by Jaroslav Halak who stopped all 31 shots fired his way.
The Blues were a -128 favorite in the win. The combined score dipped UNDER the total, which closed at 5.5.
Erik Johnson scored for the Blues in the victory. Johnson opened the scoring for St. Louis, finding the back of the net at 0:50 of overtime. The goal was assisted by T.J. Oshie and David Backes.
Jaroslav Halak turned in a 31-save effort for the Blues.
Brent Johnson stopped 23 of 24 shots for the Penguins, but it wasn't enough to earn the victory.
On the power play, St. Louis went 0-for-3, while the Penguins were 0-for-4 with the man advantage.
St. Louis lost the shots on goal battle to Pittsburgh by a margin of 31-24.
St. Louis looks to continue their winning ways next game with a battle against the Predators. The Penguins will aim to get back on the winning track at Tampa Bay.