Injured Bears quarterback Jay Cutler is working hard to return Sunday against the Detroit Lions, but he said Tuesday that scenario is unlikely.

Cutler has been out since suffering a torn groin muscle in the first half against the Washington Redskins on Oct. 20. He was expected to miss at least four weeks, which would mean three games because of the bye. But an aggressive rehabilitation regimen that includes electrical stimulation and platelet-rich plasma injections has him at a point where he expects to test his ability to play Sunday.

‘‘I don’t think we can say I’ll be out there for the Detroit game,’’ Cutler told hosts Marc Silverman and Tom Waddle during ‘‘The Jay Cutler Show’’ on Tuesday on WMVP-AM (1000). ‘‘We’re trying everything we can to get out there. It feels good, but I haven’t practiced. I haven’t been in a live situation and done all the cuts and drops and saw how it felt yet.’’

Backup Josh McCown’s performance has allowed Cutler to be more patient. McCown has a 100.2 passer rating, with three touchdown passes, no interceptions and no sacks, in six-plus quarters as Cutler’s replacement.

McCown was 22-for-41 for 272 yards, two touchdowns and a 90.7 rating in leading the Bears to a 27-20 victory Monday against the Green Bay Packers at Lambeau Field. It was the best rating for a Bears quarterback against the Packers since Kyle Orton (103.2) in a 35-7 victory in 2007.