Reigning WA winner Sorrento was eliminated in the last round, while ECU Joondalup lost in the fourth.
Lower-tiered sides Quinns FC, Joondalup United, Joondalup City, Wanneroo City, Kingsley SC and Koondoola were eliminated in earlier rounds.
NPL WA competition returns on May 21 with eighth-placed ECU Joondalup facing a big challenge to stay off the losers’ list against third-placed Bayswater City at home.
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READ NOWSorrento will look to recover against Armadale after its worst loss of the season last weekend.
ECU Joondalup snapped a four-game losing streak when it defeated Perth Glory 2-0 at Ashfield Arena.
The Jacks’ big 2016 signings Gordon Smith and Steven McGarry paid dividends, with both former professionals scoring goals.
McGarry said the side was desperate for a win.
“We’ve shipped a lot of goals in recent games and the priority today was to be tough to beat,” he told nplwa.com.au.
At Percy Doyle Reserve, Sorrento capitulated in a disastrous 5-0 loss to second-placed Stirling.
The visitors had a 4-0 lead at half-time before adding their fifth in the 72nd minute.
Coach Jamie Harnwell was understandably disappointed.
“We’ve got to get back to basics and start defending well like we did in the first half of the season,” he said.