Geoff Snider and Curtis Dickson each had three goals for Calgary (4-3), while Jeff Shattler helped with two goals and six assists. Curtis Manning, Karsen Leung, Daryl Veltman and Matthew Dinsdale also scored for the Roughnecks.
Vancouver (3-7) coming off a 19-9 victory at Colorado on Friday, got three goals from Brett Bucktooth. Lewis Ratcliff had a pair, while Tyler Digby, Cody Bremner, Nick Weiss and Tyler Garrison rounded out the scoring.
Mike Poulin stopped 28 of 36 shots for Calgary, while teammate Frankie Scigliano allowed a goal on four shots.
Tyler Richard stopped 18 of 29 shots for Vancouver, and Matt Roik allowed nine goals on 27 shots.