Joondalup heads to Fletcher Park East on Saturday and Sunday with a potential second chance if they lose the game, depending on other results.
Last weekend, a scintillating 133 off 101 balls by WA rising star Josh Inglis led the Centurions to a 190-run win at Hillcrest Lower Oval.
The hosts survived just 22 overs before being bowled for 113 in response to Joondalup’s 303.
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Michael Johnson added a half century for Joondalup and Bears’ Daniel Del Prete took 3-47.
Big Bash revelation Liam O’Connor took 2-61.
Only Ross Loiacono (32 n.o.) managed a score higher than 30 for Bayswater-Morley as Josh Anderson took 3-27 to be the Centurions’ best bowler.
Wanneroo lost its final game of the season to finish 12th, scoring just 125 in an eight-wicket loss to Subiaco Floreat at Kingsway.