Katie Cottrill/Shawn Cottrill (Belgrave, ON) run at the 2018 Palmerston Mixed Doubles Spiel came to an end in the semifinals with a 7-5 loss to Lyndsey Berlett/Scott Dow (Kitchener-Waterloo, ON). of the 2018 Palmerston Mixed Doubles Spiel in Palmerston, Ontario; Cottrill/Cottrill advanced through the quarterfinals with a 11-5 win over Jessica Shipmaker/Mike Aprile (Newmarket, ON).
 
Cottrill/Cottrill finished 3-0 in the 16-team qualifying round. . In their opening game, Cottrill/Cottrill defeated Jacinda Schiek/Mike Benjamins (Palmerston, ON) 9-6, then won 8-1 against Sharon Pringle/Terry Pringle (Coldwater, ON) and 6-2 against Tina Mazerolle/Andrew Mazerolle (Elora, ON) in their final qualifying round match.
 
. For week 12 of the event schedule, Cottrill/Cottrill did not improve upon their best events, remaining at th place on the World Ranking Standings with total points. Cottrill/Cottrill ranks th overall on the Year-to-Date rankings with points earned so far this season.