TJ Hughes and Jonathan Mendez led the Pirates with 18 points apiece to help secure the 70-57 win on homecoming night against Whitehorse on Friday.
Green River dominated Whitehorse in the first, 24-8. Whitehorse was unable to crawl out of the hole as Green River went on to grab the win.
Chance Pfander pitched in 14 and Corbin Mecham added 12 on the night.
Green River (13-5, 3-1 Region 19) will travel to Price to take on Pinnacle (6-10, 1-4 Region 19) Tuesday.