Saskatchewan has made a number of six-game injured list transactions.
Defensive back Mike Edem and defensive end A.C. Leonard come off while linebacker Otha Foster, linebacker Samuel Eguavoen and quarterback Marquise Williams, got put on.
Edem had been starting at safety and played 11 games making 15 tackles and forcing one fumble before he suffered a setback against Hamilton on September 15.
Leonard, who started 13 games making 22 tackles, four sacks and one forced fumble, was hurt in Ottawa Week 15.
Foster arrived in Regina mid-September after being released by the Baltimore Ravens. He was hurt early in the team’s Week 13 victory. Foster was the Riders Most Outstanding Defensive Player in 2016. He started all 18 games for Saskatchewan last season after signing as a free agent, registering 71 defensive tackles, four tackles for loss, three quarterback sacks, one interception and one forced fumble.
Eguaveon has suited up in 13 games making 55 tackles and one sack. He suffered an injury against Toronto in Week 16.