Extra bases

• The Cubs travel to Boston for a three-game Interleague series that starts Monday, and will continue to carry 13 pitchers and not add another bat. Renteria said he'll rotate players in the designated hitter spot.

• Kris Bryant, the Cubs' No. 1 pick in the 2013 First-Year Player Draft, has a six-game hitting streak after going 3-for-6 on Friday for Triple-A Iowa, including two doubles. Chris Rusin not only picked up the win for Iowa with a quality start, but also hit his first home run in a 16-3 victory over Colorado Springs.

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.