GAME NOTES: These are indeed tough times for the Saskatchewan Roughriders. The Riders were the CFL's best team to start the season, winning their first six games despite an abundance of injuries. But Saskatchewan has managed just two wins over its last seven games to fall back into a tie for second in the West Division standings. The Roughriders were held without a touchdown in last week's 37-12 loss to the Montreal Alouettes. Quarterback Michael Bishop was 23-of-42 passing for 364 yards but also had two interceptions. Saskatchewan was without running back Wes Cates, the CFL's rushing leader with 1,055 yards. And the Riders certainly missed Cates, running for just 35 yards against Montreal. Bishop will get the start against Calgary but the expectation is that head coach Ken Miller, given the magnitude of this game, won't hesitate to make a quarterback change should Bishop struggle. Darian Durant will be waiting in the wings. The Roughriders will face a Calgary team that's on a nice roll, having won its last four games. Included was an emphatic sweep of Toronto in a home-and-home series where the Stampeders outscored the Argos 78-20. Quarterback Henry Burris is again enjoying a banner campaign for Calgary. He has completed almost 65 percent of his passes, is third overall in yards (3,750) and second in touchdown passes (26). Last week against Toronto, Burris was 18-of-32 passing for 256 yards with a touchdown and an interception. While that's not overly impressive, the Calgary offense was capably supported by a defense that forced three turnovers and set up 17 points. A key play came on special teams when the Stampeders recovered a Mike Vanderjagt fumble in the end zone on a fake punt to take a 10-6 lead in the second quarter. Later in the opening half, Burris hit Jeremaine Copeland on a big 60-yard completion that set up Joffrey Reynolds' one-yard touchdown run. Defensively, Calgary did a solid job, holding Toronto to just 217 total offensive yards. But this is the first game in a key home-and-home series between the two that could end up deciding which team finishes first in the West Division. The numbers: Calgary is a CFL-best 5-2 on the road this season and 4-3 within the West Division. Saskatchewan is 4-2 at home but 3-4 against divisional competition. Keys to the game: It's hard to deny the impact injuries have had on the Roughriders this season. The club has 19 players on its injured list, many of them starters. Despite their record of late, Saskatchewan has done a solid job of remaining a factor in the West Division despite its injury woes. The trouble is, though, the Stampeders won't be in the mindset of giving the Riders any pity. Whoever Saskatchewan puts on the field defensively will have to get after Burris and force him to throw before he's ready. Granted, Calgary is on a nice roll but Burris has shown that, if pressured, he can be forced into making mistakes. Despite putting 44 points on the board last week against Toronto, the Calgary offense wasn't overly sharp. The unit is going to have to play much better against a Saskatchewan defense that's rugged and tough. Bishop has been rather mediocre since joining the Riders and, like Burris, can be pressured into making mistakes. And with Cates again not expected to suit up this week, the Calgary defense will have the added luxury of being able to pin its ears back and come after Bishop.