The Canucks overcame a 12-1 deficit at Vanstone Diamond before settling for a 14-14 tie and then rolled to a 14-3 victory to close out the twinbill.
Moose Jaw is now 6-0-1 on the campaign.
They’re back on the field for a first-place showdown on Canada Day, when they host the Lumsden Cubs 1 (6-0) for a doubleheader, with games at 1 p.m. and 4 p.m. at Vanstone.
Canucks 14, Expos 14
The Expos didn’t waste any time getting things going, taking advantage of a few too many walks to score the maximum six runs in the first and another six in the second for their 11-run lead.
Moose Jaw chipped away with four runs of their own in the second and another three in the third to get back within striking distance 12-8. That set the stage for the fourth, where the Canucks would send 11 hitters to the plate and put up a max six of their own to lead 14-12.
They’d be unable to hold onto the edge, though, and settled for the 14-14 tie.
Nixon Adrian, Isaiah Ross, Houston Willmer and Cruz Schwabe all scored two runs each for Moose Jaw.
Canucks 14, Expos 3
There were no such dramatics in the second game.
Regina scored a pair in the first, but the Canucks responded with the max runs in their half and led 8-3 heading into the bottom of the fourth, where they up another six-spot to secure the mercy-rule win.
Willmer scored all three times he reached base while Schwabe also crossed the plate twice.