"I'm doing a little bit more than maybe normal, but what's normal," Lohse said. "You're doing a pretty not-normal thing when you're throwing a ball, so you can have little things come up."
In his eight big league years, Lohse has never missed a start, let alone made a trip to the disabled list.
Because of his durability over the years, he continued to downplay the soreness in the back of his shoulder. Manager Tony La Russa expressed some concern, though, saying he was not yet confident that Lohse will toe the rubber this weekend.
After Thursday's 11-5 loss to the Pirates, La Russa said he did not use rookie reliever Mike Parisi because he wanted to make sure Parisi could start Sunday, if need be.
"I'm glad to hear that he's OK with it -- I mean I'd love to pitch him," La Russa said. "He's a veteran, so he knows what he feels.
"But it's not something you ignore. If the day comes and he doesn't feel good about going out there, I'd rather pitch the kid. I don't want to risk anybody."
Lohse said he has not yet spoken to La Russa about his shoulder and said his manager's comments on Parisi after the game Thursday caught him off guard.
The Cardinals signed Lohse on March 14, right in the middle of Spring Training. Thus far, he is 3-2 with a 4.92 ERA. Because he was signed late, Lohse admitted he may have rushed Spring Training a little bit but said his arm is not a major problem.
"If you went to each guy and asked them how their arm felt, I think they'd be lying to you if they said it felt 100 percent," Lohse said. "Nobody does, especially after a couple of years. I feel as good as I should."
Lee Hurwitz is an associate reporter for MLB.com This story was not subject to the approval of Major League Baseball or its clubs.