Aaron Black notched up 32 disposals and two goals to help the Falcons to a 14.12 (96) to 11.9 (75) win.
Aaron Elari had 27 disposals in a losing effort.
East Perth jumped Peel into third position on the WAFL table following a 32-point win over the Thunder on Sunday.
Get in front of tomorrow's news for FREE
Journalism for the curious Australian across politics, business, culture and opinion.
READ NOWBrendan Lee led from the front with 33 disposals, eight tackles and six inside-50s in the 13.16 (94) to 8.14 (62) win.
Clancee Pearce notched up 38 disposals in the loss.
Claremont boosted their chances of a finals berth with a 35-point win over East Fremantle.
Beau Maister booted six goals from 12 disposals to help the Tigers to an 18.7 (115) to 12.8 (80) win and hold off Swan Districts for fifth spot by percentage.
Brandon Ellis booted four goals for the Sharks, who have not won since round eight.
In an open letter to fans, East Fremantle president Mark Stewart said the Sharks should have a new coach in place in the coming months.
"We are extremely happy with the quality of applications and we are certain that next year's coach will be what our club requires going forward," he said.
Kyle Halligan booted six goals as Subiaco showcased the vast gap between the competition's best and bottom-placed teams.
Matthew Boland booted five and Chris Phelan four as the Lions finished 22.15 (147) to 8.6 (54) victors.
Callum Walley was solid up forward for Perth with four majors.
METRO Football League scores for round 19 at the weekend:
Wanneroo 18.17 (123) def Warwick Greenwood B 7.8 (56).
Baldivis 23.9 (147 ) def Queens Park 10.10 (70).
Dwellingup 18.17 (125) def Innaloo 13-15 (93).
Warwick Greenwood A 18.14 (122 ) def Midland 10.6 (66).
Alkimos 16.12 (108) def Koongamia 8.12 (60).
Finals start Sunday, August 23 at Robinson Reserve, Tuart Hill:
1st final Alkimos v Innaloo 10.50am. 2nd final Warwick Greenwood v Dwellingup 12.50pm. 3rd final Queens Park v Baldivis 3pm.