Litsch has been suffering through a living nightmare ever since he received a platelet-rich plasma (PRP) injection to treat inflammation in his sore shoulder.
The PRP ended up causing a serious infection which required an emergency surgical procedure that, if left untreated, could have become a potential life-threatening injury.
It was believed, at the time, that the emergency procedure successfully removed any lingering infection, but more than two months removed from the surgery, Litsch is still experiencing pain.
"Obviously it's unfortunate that he's had to deal with the situation," manager John Farrell said. "We're still waiting. When he was still experiencing some discomfort he was sent out to see Dr. Lewis Yocum as a second opinion.
"The MRI didn't show any structural damage. While he's in the early phases of a throwing program and still feeling some discomfort, we took the next step to take some additional blood tests to make sure the infection is completely gone. We're still awaiting those results.
"But it was upon the recommendation and evaluation of Dr. Yocum that over these next two weeks, he needs to continue to go through the rehab. Continue to work on his range of motion, which it came back fully and then when he started to throw he felt a little bit more of that discomfort."
Litsch will continue to be monitored by the club's medical staff while waiting for the latest test results. That could shed more light on what the current issue is, although Farrell admitted this is a pretty rare situation.
"I don't know that for any of these situations there is a clear-cut template, every case is going to be a little bit different," Farrell said. "But hopefully this isn't a career-ending injury. This is a good pitcher and, like many guys, they go through some injuries that they've got to correct and hopefully there's every step taken to date puts him in line to do that. Hopefully, we get him back in the not too distant future."