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06/07/11 7:27 PM ET

Ailments keep Rolen, Renteria out

CINCINNATI -- Reds third baseman Scott Rolen was not in the starting lineup for a third straight game on Tuesday because of a bout with strep throat. Rolen said he was still not feeling much better.

Backup shortstop Edgar Renteria has good lifetime numbers against Cubs Tuesday starter Doug Davis, but a sore lower back still kept him out of the lineup. Renteria has not played since June 1, but he is not a candidate for the disabled list at this point.

"He's a lot better," Reds manager Dusty Baker said. "If he continues this, he could be ready for a couple of games in San Francisco. If he wasn't, we'd be thinking about DL-ing him. But if we don't have to, we won't."

Chapman leaves for Double-A rehab stint

CINCINNATI -- Reds lefty Aroldis Chapman departed on Tuesday to resume his Minor League rehab assignment, this time at Double-A Carolina.

Chapman made three appearances for Triple-A Louisville, but none since May 29. Although he had a 13.50 ERA in his stint there, the decision to send him to Carolina appears to be more about geography. Louisville is on a road trip at Syracuse, while Carolina is playing closer this week at Chattanooga and outside of Knoxville.

"It doesn't really matter as much with competition as it does getting on the mound," Reds manager Dusty Baker said. "Right now, his main competition is himself, not who he's pitching against."

Chapman is expected to make at least two appearances with the Mudcats.

During his May 29 game, Chapman gave up four earned runs and four hits with two walks over 1 2/3 innings. He had a strong first inning but struggled in the second. The club summoned him back to Cincinnati, where he had bullpen sessions under the supervision of pitching coach Bryan Price.

Chapman, 23, was placed on the 15-day disabled list on May 16 with left shoulder inflammation. He had 20 walks and 15 strikeouts over 13 innings and a 6.92 ERA in 16 appearances with the Reds.

"He's been working hard," Baker said. "We anticipate and hope he'll be back soon because he's a big part of our bullpen."

Thompson optioned to make room for Volquez

CINCINNATI -- To make room for the recall of starting pitcher Edinson Volquez from Triple-A, the Reds optioned right-hander Daryl Thompson back to Louisville.

Thompson's second big league stint of 2011 was a brief one. He was called up on Monday after pitcher Chad Reineke was sent down and did not get into a game. Thompson made one appearance for the Reds in his previous one-day callup, giving up five runs in a three-inning relief outing at Philadelphia on May 26.

Mark Sheldon is a reporter for MLB.com. Read his blog, Mark My Word, and follow him on Twitter @m_sheldon. This story was not subject to the approval of Major League Baseball or its clubs.