Extra bases

Felix Doubront, acquired from the Red Sox on July 30 for a player to be named, will make his first rehab start for Triple-A Iowa on Tuesday. Doubront, 26, has been sidelined with a strained left calf. This season he went 2-3 with a 4.54 ERA in eight starts with the Red Sox, then was placed on the disabled list with a strained left shoulder. He pitched in relief upon his return, and in 17 appearances (10 starts) went 2-4 with a 6.07 ERA.

• Right-hander Brian Schlitter, placed on the DL on Sunday with inflammation in his right shoulder, will rehab at the Cubs' complex in Mesa, Ariz. Schlitter compiled a 2.98 ERA in 43 games before the All-Star break, but teams were batting .379 against him in 10 games after the break, and he had a 6.43 ERA in that stretch.

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.