Corrimal leapfrogged Dapto into fourth spot, Helensburgh reclaimed second and Northern Districts upset Wollongong in Saturday's round 14 in Illawarra cricket.
A week after Dapto and Wollongong were the only sides to win in an otherwise washed out round 13, both clubs were thrashed, with Corrimal marching back into the top four and Wollongong sliding to third after being belted by Norths.
At Reed Park, Helensburgh showed why they're the reigning one-day champions with a 134-run mauling of Dapto.
Steve Blissenden took 3-6 and made 85 as the Burgh posted 225.
Dapto (91) had only Richard Marsh (30 not out) in the runs.
"It wasn't good. We're back to fifth and with four games to go we have to respond," Dapto skipper Michael Stephenson said.
Meanwhile, Northern Districts took 8/30 against Wollongong to dismiss the home side for just 104.
Cam Nupier took 4-27, while Mark Johnson wrapped up a six wicket win with an unbeaten 54.
"It was pretty clinical," Butchers skipper Tommi Bozinovski said.
"We bowled well, fielded well and finished it off well with the bat.
"Mathematically if we win our next three games we can maybe make the top four but it's really about putting solid performances together from here on."
At Figtree Oval, Corrimal looked top four with a six wicket win over Wests.
Joe McDevitt (49 not out) and younger brother Tom (25 not out) put on an unbroken 56 to spearhead the Cougars to victory.
Corrimal's bowlers Brad Jardine (3-20) and Ben Rabjohns (2-29) rolled the home side for 127, with Maciu Gauna (55) the resistance.
Meanwhile, opener Luke McNamara (42) top-scored as University celebrated their second win of the season blasting aside Port Kembla at Uni Oval.
Port's slim finals hopes were dismissed with them for 152 in the 45th over.
Chris Lewis made 40 for the visitors, while five Students took two wickets, led by Ryan Holcroft's 2-36.
Uni skipper Amit Balgi (40) supported McNamara as the home side won with 15 overs to spare.
Finally, leaders Keira (160) extended their lead to 57 points over Helensburgh with a 38-run win over Balgownie (122).
Nick Bell took 5-28 for Keira, while skipper Graeme Batty top-scored with 37, his lowest one-day score of the season. Michael Toussis took 5-16 for Bally.
Meanwhile, Corrimal are the Illawarra under 21 champions after a three wicket win over Helensburgh in the final of the Phil Jaques Cup yesterday.
The Burgh were bowled out for 121 with Mitch McCrea (32) top-scorer and Kendrick Hatton taking 3-37 for Corrimal.
In the run chase Mitchell Jones (40) top-scored, while Victor Lubbers took 5-33.