Ryan Dempster allowed one run on seven hits and stuck out six in Friday's loss to the Pirates.
Carlos Marmol (hamstring) tossed a scoreless inning Friday in his first minor league rehab appearance with Triple-A Iowa.
Starlin Castro went 2-for-5 with a stolen base in Friday's loss to the Pirates.
Steve Clevenger (oblique) is slated to play nine innings with Triple-A Iowa on Monday and Wednesday before being reevaluated.
Carlos Marmol (hamstring) is scheduled to begin a minor league rehab assignment Friday with Triple-A Iowa.
Ian Stewart was scratched from Friday's lineup with soreness in his left wrist.
Cubs signed INF Diory Hernandez to a minor league contract.
Darwin Barney finished 0-for-4 with two strikeouts in Wednesday night's loss to the Astros.
Jeff Samardzija allowed two runs on six hits in six innings of work on Wednesday, taking a hard-luck loss in Chicago's 5-1 setback in Houston.
Reed Johnson went 2-for-4 with a solo home run in Wednesday's loss to the Astros.
Carlos Marmol (hamstring) threw a successful bullpen session Wednesday in Des Moines, Iowa.
Astros released INF Diory Hernandez.
Steve Clevenger (oblique) went 0-for-2 on Wednesday in his second rehab game with Triple-A Iowa.
Cubs general manager Jed Hoyer insists that Anthony Rizzo's development -- and not his free agent/arbitration clock -- will dictate the timing of a promotion from Triple-A Iowa.
Alfonso Soriano blasted his fourth home run of the year Tuesday in a losing effort against the Astros.