Katie Cottrill/Shawn Cottrill (Belgrave, ON) qualified for the 2021 Palmerston Mixed Doubles Spiel playoffs, dropping their quarterfinals match 8-1 against Catherine Liscumb/Chris Liscumb (Ilderton, ON). of the 2021 Palmerston Mixed Doubles Spiel in Palmerston, Ontario;
 
Cottrill/Cottrill finished 2-1 in the 16-team qualifying round. . In their opening game, Cottrill/Cottrill defeated Brittany Elson/Spencer Cheesman (Barrie, ON) 7-6, then won 7-3 against Kaitlin Jewer/Robert Currie (Toronto, ON). Cottrill/Cottrill went on to lose 8-4 against Lyndsey Wilson/Scott Dow (Palmerston , ON) in their final qualifying round match.
 
Cottrill/Cottrill earned 9.129 world rankings points for their Top 5 finish in the Palmerston Mixed Doubles Spiel. For week 14 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.