Saskatchewan Roughriders quarterback Isaac Harker throws a pass during training camp on July 14, 2021. (Saskatchewan Roughriders) Preparations for the 2021 CFL season were a family affair for Isaac Harker. “I was having my sister (Tori) call out the (plays) so I could call out the (plays) and work on footwork. The biggest thing was visualization and doing that five times a week and it’s huge and such a big advantage and now all that’s left to do is get some physical repetitions,” the Saskatchewan Roughriders quarterback said after Wednesday’s training-camp workout at Mosaic Stadium. “For every couple hours of playbook study and help out, I had to get her a Dunkin’ Donuts coffee. She probably knows the offence as well as anyone.”