Billy Hamilton jammed his left thumb against St. Louis and aggravated it trying to make a diving catch against Colorado on Wednesday.
"He jammed it when he made that catch in St. Louis," said Bryan Price of the catch on which he robbed Matt Carpenter of a home run. "He aggravated the thumb diving for a ball against the Rockies. He won't start for a couple days."
Hamilton wore a half glove protector on his thumb before the game. He was on his way to have it examined.
"I just don't want a big cast on it," Hamilton said.
Homer Bailey is expected to make a start for Louisville against Indianapolis.
"We just want to see health," Price said. "The numbers don't matter that much. A lot of times the starts in the minor league don't turn out like you'd expect."
John Lamb is scheduled to start on Friday for Louisville against Toledo..Lamb made a rehab start on Saturday for Louisville. He allowed three earned runs on six hits and a walk in three innings.
Anthony DeSclafani is scheduled to start his rehab assignment in Pensacola against Jackson on Saturday.