Lohse characterized his hamstring as "a little sore" on Friday, but that didn't keep the right-hander from playing catch and taking swings in the batting cage. He continued to receive treatment on his leg, as well.
The Cardinals should have a better gauge on Lohse's status on Saturday, since that is when he is scheduled to throw his in-between-starts bullpen session. If Lohse is unable to throw, the Cardinals are likely to begin seriously thinking about a contingency plan.
Lohse doesn't anticipate that being necessary.
"I really don't see any issues, besides dealing with soreness in there," Lohse said. "I've tested it for strength and all is good. It's just a mild strain. I don't know exactly what happened. It just felt like a real bad cramp."
Lohse pitched one more inning on Wednesday after initially feeling the discomfort. He allowed one run on seven hits in the five-inning outing.