The team played in the City of Ohsweken, Ontario, Canada and participate in the OLA Senior B Lacrosse League.

The Rivermen would beat the Norwood James Gang 3-straight in the semi-final, but were swept in 3 games by the eventual Presidents Cup champions, the St. Catharines Saints.

The Rivermen came together in the next game and beat the Kahnawake Mohawks 9–8, then the Nanaimo Timbermen 8–5, Akwesasne Outlawz 14–9, and the Tri-City Bandits 9–7 to finish the round robin 4–2–0 and in fourth place.

After finishing in first place in the OSBLL with a record of 12 wins and 4 losses, the Rivermen would sweep both the Oakville Titans and the Brooklin Merchants with 3-game-sweeps.

In the semi-final, the Rivermen would avenge their 2014 title loss with a 12–10 win over the Onondaga Redhawks, before beating the Capital Region Axemen 14–11 to take the national championship.