"Right now, he's just working with our medical staff to get himself to where he feels confident in hitting the go button," Mozeliak said. "I think, obviously, you have to get rid of the general soreness, and you hope the injection accomplishes that. From there, when you begin the throwing program, you'll get a sense of how he reacted to that injection."
Though Rosenthal also complained of forearm discomfort, an MRI of his elbow gave the Cardinals no reason to fear structural issues there. As a result, this rehab work will be focused mostly on strengthening the shoulder.
Before being placed on the DL on July 26, Rosenthal had spent much of the season searching for command. This shutdown came after he had already been removed from the closer's role and at a time when Rosenthal had a 5.13 ERA, 2.040 WHIP and a walk rate of 7.3.
• Jordan Walden, who has been out since late March with a right shoulder strain, could be headed out on a Minor League rehab assignment by the end of next week, Mozeliak said. Walden recently returned to St. Louis to show the medical staff the progress he has made while rehabbing in Texas. He threw multiple side sessions off the mound while there.
• Michael Wacha (right shoulder inflammation) will visit a Chicago-area specialist on Friday for a second opinion on his injury. Wacha said he chose to schedule a visit with this doctor under the advice of his agent.
Jenifer Langosch has covered the Cardinals for MLB.com since 2012, and previously covered the Pirates from 2007-11. Read her blog, By Gosh, It's Langosch, follow her on Twitter @LangoschMLB, like her Facebook page Jenifer Langosch for Cardinals.com and listen to her podcast. This story was not subject to the approval of Major League Baseball or its clubs.