The Missoula Osprey have their backs against the wall.

Fortunately, the wall their backs will be against is at Ogren-Allegiance Park.

The Great Falls Voyagers took a 7-4 win over the Osprey on Sunday night at Centene Stadium in the opening game of the best-of-three Pioneer League Northern Division playoff series. Game 2 is Monday at 7:05 p.m. along the banks of the Clark Fork River.

The Voyagers jumped on Missoula starter Cole Stapler for four runs in the first two innings and the Osprey were behind the 8-ball the rest of the night.

The game started well enough for Missoula, which scored twice in the top of the first on a single by Keshawn Lynch and a fielder's choice grounder off the bat of Andy Yerzy.

But a two-run homer by Anthony Villa tied the game in the bottom of the first and another two-run jack by Nate Nolan gave the Voyagers the lead they never relinquished.

Great Falls scored single runs in the fourth, fifth and sixth to offset a two-run burst by Missoula in the sixth. Yerzy belted a homer to right field to account for both of those runs.

Stapler lasted just 4 1/3 innings, allowing eight hits and six runs, five of which were earned. Rafael Pujols got out of the fifth and Jeff Bain tossed three innings of one-run ball to finish up.

Great Falls starter Chris Comito got the win. He allowed eight hits and four runs over 5 1/3 innings. Three relievers kept the Osprey at bay the rest of the way.