Durant's throwing hand was banged up late in the first half against Vancouver last Sunday, and he still wasn't 100 per cent while he was throwing the ball at Riders' practice on Wednesday.
Head coach Corey Chamblin can't say yet if Durant will be QB at the Labour Day Classic against Winnipeg at Mosaic Stadium.
"I can't give you an update," Chamblin said. "Like I told him, I said 'Well, until I actually see you throw, then it doesn't look likely.'"
Durant said he's "striving to play" but it's still wait-and-see.
"The hand's sore, it's pretty sore, but we'll just take it a day at a time and see where we are," he said. "If I can't, then I know [backup QB] Tino [Sunseri] will be ready."
Sunseri, who threw for Saskatchewan in the second half in Vancouver, impressing many, said he's prepared to step in again.
"I always go out and always think that I can get the job done," he said. "Nothing really changes for me; just go out, execute, understand what the situations are, put the ball on our receivers and make the smart play."
While concerns about quarterbacking have been swirling around Rider Nation, there's also fan excitement about the impending return of former star receiver Weston Dressler.
Reports say Dressler, who was cut from the Kansas City Chiefs roster on Monday, has re-signed with the Riders and might be able to play on Sunday.