"His story is a great story, because he's trying to come back," Cubs manager Rick Renteria said Sunday of the right-hander, who was acquired from the Braves in July 2012 in the Paul Maholm deal. "He's worked very hard to get back to where he is right now, and it's still a progression. There are still some things that he'll have to work through. We'll be extremely patient with how we move forward with him."
• Renteria said Sunday he had yet to speak with pitcher Edwin Jackson about the right-hander's last outing in which he only threw fastballs. Jackson said he wanted to work on his fastball command, but he didn't tell Renteria or pitching coach Chris Bosio about his game plan.
• George Kottaras, 30, has played for the Red Sox, Brewers, Athletics and Royals, and he has had several different catching coaches. He likes the feedback he's gotten from Cubs coach Mike Borzello.
"We have the same theories, and we're coming from the same background," Kottaras said. "I had [coach] Gary Tuck back when I was in Boston, and he had Gary a long time ago, too. Same philosophy, so right away we were on the same page. Sometimes over time, things change but not purposely. Sometimes you get out of whack, per se.
"[Borzello] saw a little something in my stance with runners on and brought it up, and I said, 'You know, you're right,' and it changed everything. It was just a reminder that helped. We're not afraid to talk about things. He'll ask, 'What do you have on this? What do you have on that?' That's how you learn."
Carrie Muskat is a reporter for MLB.com. She writes a blog, Muskat Ramblings, and you can follow her on Twitter @CarrieMuskat. This story was not subject to the approval of Major League Baseball or its clubs.