Rapid Reaction: Reds 4, Cubs 1

CHICAGO -- Here's a quick look at the Chicago Cubs' 4-1 loss to the Cincinnati Reds:

How it happened: Cincinnati scratched across a run in the fifth to jump out to a 1-0 lead. Catcher Devin Mesoraco led off the inning with a single, stole second, advanced to third on Alfredo Simon's swinging bunt and scored when speedster Billy Hamilton blooped a double in between Junior Lake and Ryan Sweeney in shallow left-center field. The Reds added two unearned runs in the sixth when Jay Bruce and Ryan Ludwick scored when Emilio Bonifacio failed to turn a double play and his throw got past Anthony Rizzo. The Cubs ended 24-inning scoreless streak when Starlin Castro came around to score on Luis Valbuena's seventh-inning single. However, that was all the offense could muster, as another solid outing from Jeff Samardzija (seven innings, six hits, one earned run, seven strikeouts) was wasted.

What it means: Rizzo continues to hit (2-for-4) and Castro delivered a single, but not much else positive came from the offense. The outfield has been the biggest sore spot on the offense and that trend continued on Friday with Nate Schierholtz, Lake and Sweeney combining to go 0-for-12 with Lake striking out three times.

Outside the box: Jake Arrieta is expected to make his fourth rehab start of the year, this one at Triple-A Iowa on Monday. If all goes well, the hope is that Arrieta will rejoin the Cubs staff the next time through the rotation.

Up next: Edwin Jackson tries to get back on track after posting a 6.19 ERA in his first three starts of the season. He takes on the Reds and the fastball-heavy Tony Cingrani at 1:20 p.m. CT Saturday.