Brandon Jacobs pieced together a quick 77 runs but it wasn't enough to lift Rockingham-Mandurah to victory as they fell short to a red-hot Scarborough on Saturday afternoon.
Jacobs' starred compiling his knock in just 82 deliveries, leading the Mariners to 235 runs as they opened the 50-over clash.
But the Gulls responded with their own prolific batting performance, chasing down the required runs in less than 37 overs thanks to impressive showings from Nicholas Maiolo (81), Liam Knight (63 not out) and Lochie Hardy (41).
Electing to bat first after winning the toss, the Mariners were in strife when skipper Tyler Robertson was sent packing on just nine runs.
Craig Simmons fell for just one run shortly after, but the work of Brandon Burt (49) and Tom Lammonby (32) helped steady the ship.
The duo combined for a short 32-run stand that helped breathe a little life into the side, before Jacobs arrived at the crease eager to find the boundary, which he was able to do so 10 times.
His efforts formed the crux of the team's total, with a late 35 from young gun Teague Wyllie helping push the side past the 200-mark.
Samuel Timmins proved the pick of the Gulls' bowling attack, taking 3/30 as he and his teammates dismissed the Mariners for 235.
Rockingham-Mandurah's defence of the total was off to an excellent start when they ousted Scarborough opener Matthew Spoors for a duck, with Ryan Done hauling in the catch off a Leon Coombs delivery.
But Maiolo arrived to assist Hardy as the duo quickly turned 1/14 into 1/111, before the latter was dismissed on 41.
Hardy's fall didn't make things any easier for the Mariners though, with Knight coming in and blasting out eight boundaries (five of which went for six), on his way to an unbeaten 63.
Together the trio was able to guide the Gulls to a win in 36.5 overs.
The victory has Scarborough sitting in fourth on the ladder, while Rockingham-Mandurah slumps to 11th with a second straight defeat.