Pinjarra's unbeaten run stretched to four games as they kept their pristine record intact with a victory over Mandurah in hot conditions at Sir Ross McLarty Park on Saturday.
A masterful knock from Alex Roberts (74 not out) and some class from Josh Smith (67) proved the catalyst in the Tigers' victory, as the duo accounted for far more than half of the side's total 203 runs.
Electing to bat first, Smith's early blast gave the home side plenty of leverage early.
He took just 75 deliveries to carve out his 67 runs, smashing the ball past the boundary eight times (two going for six) as he had the side in a strong position early.
Fellow opener Jamie Lee only notched nine runs of his own but provided valuable support as their opening stand went for 69 before he was dismissed.
Smith left the crease soon after, but the arrival of Roberts gave Pinjarra further elevation.
Wickets fell with regularity around the third-in-line batsman, with Mandurah's Matt Jenkinson continuing his outstanding form to snare 3/44.
But the Tiger was undaunted, as he survived to see his team for 7/203 after 50 overs.
Mandurah's chase was off to a nightmare start when the loss of Justin Solly (0) and Brendan Okey (3) left them in a 2/6 hole, and not even Jenkinson's game-high knock of 79 runs could save them from there.
Kim Eddy (3/13) and Jordan Hodgetts (3/38) led the charge with the ball for Pinjarra as they claimed a fourth consecutive victory, ousting Mandurah on 143 in the 45th over.
The Tigers remain atop the ladder following the win, while Mandurah's second defeat on the trot sees them slip to fifth.
Websdale stars in Seals' first win
Sebastian Websdale picked up four wickets as his Shoalwater Bay side claimed their first win edging out South Mandurah on the weekend.
His form with the bat had the Seals in a slump early, however, with Falcons all-rounder Brad Holmes nabbing him leg-before-wicket for a duck that had Shoalwater sitting at 1/4.
But Matt Rose (45) and Louis Unuwai (43) resurrected the innings, leading the team to a total 192.
Souths appeared primed for a win when Holmes (53) and Jacob Smith (44) put up a 91-run opening stand, but it was a disaster once the pair were out, as the Falcons lost seven wickets in the space of 35 runs to wind up all out on 175.
Warriors win grand final rematch
Waroona maintained bragging rights with a victory in their grand final rematch against Singleton on Saturday.
Sent into bat first Singleton was crippled when their top order was sent packing before the side could reach 50 runs, and an inspiring, unbeaten knock of 72 from Daniel Jones was the only bright spot in the innings as they wound up on 8/149.
Keren Ugle was prolific with the ball for the Warriors, taking 2/10 and bowling five maidens across a 10-over spell.
From there Nick Milligan powered Waroona on their way to victory, scoring 75 as they romped past Singleton in just 33.1 overs.
De Klerk shines in win for White Knights
Opening batsman Willem De Klerk was a difference maker in Baldivis' victory over Halls Head, smashing out 52 runs to lead the team.
His hard work, alongside that of Mitch Brown (45) and Roy Crouch (34) paved the way for the White Knights to tally 8/204 from their allotted overs.
Halls Head looked to strike back and were in a great position with Josh Rudge (67) playing a skillful brand, and a further 47 from Chris Phelps provided a boost.
But Andrew Smart (3/23) led the charge with the ball for Baldivis and eventually helped rectrict Halls Head to 9/186, falling short of the required total.