ST. LOUIS -- White Sox lefthander John Danks allowed three runs -- one of which was earned -- in four innings in his rehab start for AAA Charlotte on Tuesday afternoon.

Danks gave up four hits and one walk while striking out one. He went on the 15-day disabled list retroactive to May 20 after feeling discomfort in the back of his left shoulder.

"I heard he feels fine,'' manager Robin Ventura said Tuesday. "It's a step in the right direction, so keep going.''

Danks threw 61 pitches, 34 for strikes in his start against the Columbus Clippers in Columbus, Ohio.

Jose Quintana, who replaced Danks in the starting rotation, will face the Cardinals in St. Louis Tuesday night when the sox open a three-game series. Quintana is 1-1 with 2.05 ERA over five appearances and three starts. The Sox have not said whether Danks, their Opening Day starter who signed a $65 million extension during the offseason, will make another rehab start before returning to the team.

"I'd like him to have one more [start] to make sure, and not make it a nine-inning, knock-down, drag-out,'' Ventura said.

"It's more about how he's feeling.''