Cardinals pitcher Michael Wacha, who has not thrown a baseball since going on the disabled list because of a precursor for a stress fracture in his right shoulder, will have a series of scans done on the joint Monday to determine how much healing has taken place and whether he can begin a throwing program.

“Shutting it down for these couple of weeks will get (the irritation) out of the way, and I should be good to go,” Wacha said Friday. “I can feel the tightness is gone. Hopefully these test will show the inflammation is gone and there is not much of a reaction.”

Wacha, who turned 23 last Tuesday, was diagnosed with a stress reaction in his right scapula. The injury, which was near where the bone meets one of the major muscles in the rotator cuff, created a sensation of tightness more than pain in the shoulder, Wacha said. He pitched several times through that discomfort, and the second-year starter last threw a pitch in competition when he struck out seven and won a six-inning appearance against the New York Mets on June 17.

An MRI scan of the area showed some sign of trouble, and a CT scan taken of the same area revealed the stress reaction. The bone was not rebuilding itself as quickly as it was breaking down, and that indicated the chance of a future stress fracture.