The Senators ended a tough three-game road trip with one of their gutsiest games of the season, a 5-4 shootout win.

After losing in regulation to the Toronto Maple Leafs Saturday and in overtime to the Pittsburgh Penguins Monday, the Senators wanted to salvage something from their brief visit to the Gateway city.

And they managed a hard-fought two points by stunning the Blues with three shootout goals on Jaroslav Halak, including the winner by Kyle Turris.

Talk about an upset – the Blues had been 53-0-1 in their last 54 games at home in which they’d scored at least three goals.

In addition, St. Louis had not lost to an Eastern Conference team on home ice before Ottawa’s arrival. The Senators finish the season series 2-0, and the Blues will be glad to see the last of them.

The stars aligned in the eastern standings for Ottawa as Washington and Carolina both lost.

Despite a late arrival the night before, the Senators produced a spirited effort against the Blues, one of the league’s toughest to face in their own rink. With the loss, St. Louis fell to 20-6-2 at the Scottrade Center.

Ottawa’s shining moment came in the third period as the Senators stormed back from a 3-1 deficit to surge ahead 4-3 on three goals, one by Jason Spezza, by Milan Michalek, set up by Spezza and a flukey one from the corner by Turris.

The Blues tied the game on a funny one of their own, as a Jordan Leopold shot went in off Lehner from a bad angle.

As was case in Pittsburgh, the Senators found themselves in penalty trouble — some calls warranted but a couple very dubious, leading to further frustration. Winger Clarke MacArthur received a 10-minute misconduct for expressing his displeasure at the end of 40 minutes.

The teams traded second period goals, as Erik Karloff tied the game 1-1 with a blast off a stunning, no-look backhand pass from Jason Spezza at 14:50. Spezza would set up another beauty on the backhand in the third, a Milan Michalek goal to make things interesting.