Sale have been struck by an injury blow as veteran scrum-half was ruled out for up to three months after he suffered a torn biceps.
Stringer joined the north-west club from Bath last season and alongside new signing Mike Phillips offers Sale experienced half-back options.
But the 38-year-old will be missing from the squad for several weeks due to the injury which he picked up in the club's draw at Worcester.
"He snapped his bicep tendon on Saturday so he's going to be out for two to three months," director of rugby Steve Diamond told BBC Sport.
"The rest of the walking wounded are about two or three weeks away."