Dale Sveum is eager to have take-charge, Gold Glove second baseman Darwin Barney return to the lineup Tuesday to help shore up the defense.

The Cubs already have committed 10 errors this season, but mental mistakes have been costly as well.

"Barney ... has complete awareness of the situation and can slow the game down between the 15 seconds that another pitch is thrown," Sveum said. "(He knows) how the game can change from count to count and score to score, hitter to hitter, left-handed to right-handed … those are the things that we are trying to get the rest of the infield to be aware of."

Baseball IQ is an important intangible.

"It's huge,," Sveum said. "It's very intangible, especially when you can get eight guys on that same page."

Injury report: Catcher/third baseman Steve Clevenger was placed on the 60-day disabled list after an MRI revealed that he suffered a strained left oblique when he struck out to end Saturday's game against the Giants.

Clevenger missed almost five weeks last year with a strained right oblique.

"It's definitely frustrating. At the same time I am determined not to let it get to me," Clevenger said. "Get my work in and get back as soon as possible. Soon as I swung I felt like someone stuck a knife in my side. The reason I wasn't moving was because I couldn't really breathe too good, so I was just trying to stay down to catch my breath. It took a while for me to catch my breath."

Help on the way?: The Cubs announced the signing of veteran reliever Kevin Gregg to a minor league contract. Gregg, who formerly closed for the Cubs in 2009, was released by the Dodgers at the end of spring training. Gregg will report to Mesa to throw and get back in shape. He is not expected to step into the role of Cubs closer this year.