"It's just a matter of having a quick turnover, playing two games in 24 hours, you've got to get Navarro in there," Sveum said.
The Cubs played a night game in St. Louis on Thursday, and had a day game on Friday against the Astros. With Navarro in his last start on Sunday against the Mets, Garza threw seven shutout innings.
• The Cubs are mulling possible roster moves, Sveum said. The team was carrying eight relievers, having added a pitcher after outfielder David DeJesus went on the disabled list last Saturday because of a sprained right shoulder.
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.