There's been no official press release by the Cubs on the option of Kyle Schwarber to Triple-A Iowa and the recall of Matt Szczur, but this lineup pretty much makes it official:
In three previous stints with the big-league Cubs this year, Szczur went 6-for-36 with six RBI and two stolen bases. He's in the lineup tonight, likely, because lefthander Clayton Kershaw is starting for the Dodgers. Szczur once went back to Iowa this year the day after hitting a walkoff single in extra innings against the Pirates (photo above).
Chris Coghlan, who usually starts in left field, currently has the longest consecutive games-played streak in baseball: 131 games. Streaks like this are becoming more and more rare as players get platooned, or need days off during long seasons. It seems likely that Coghlan will pinch-hit sometime tonight, so that streak might continue.
Schwarber heads to Iowa to work on his catching (and by some reports, he'll also play some outfield) after going 8-for-22 (.364) in six games with the big-league Cubs with a triple and his first major-league home run. He'll be back, I'm sure, sometime later this year.