Craig, who is sidelined by a left mid-foot sprain, is wearing a boot to immobilize the injury sustained rounding first base Wednesday in Cincinnati.
Craig has had a pair of MRI exams and met with a handful of doctors whose opinions have the Cardinals cautiously optimistic.
Craig was among the NL leaders with 97 RBIs and was batting .454 with runners in scoring position, the best in the majors.
The Cardinals activated pitcher Jake Westbrook from the 15-day disabled list in time for Friday night's game against the Pittsburgh Pirates, but he'll be in the bullpen for now instead despite the rotation's recent struggles.
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