Saskatchewan sal volgende Sondag in Winnipeg in die Westeindstryd speel.
Nadat beide spanne velddoele op hul aanvanklike oortydbesit geskop het, Calgary had the ball first in the second overtime and Rene Paredes missed a 44-yard try. After two runs by William Powell, Lauther kicked the winner.
Paredes forced overtime with a 47-yard field goal with 59 sekondes oor in regulasie.
The teams combined for eight turnovers, six in the first half. Riders quarterback Cody Fajardo threw four interceptions, and Calgary’s Bo Levi Mitchell had two picked off.