Jeff Samardzija isn't starting tonight (although it may have been his turn) for Mexicali. As a matter of fact, he's no longer listed on their roster. Schlitter, Camp and Snyder are still there, but wtvr.
I checked Google News and, lo and behold, Cubs.com is already reporting it:
On Friday, [Thomas] Diamond, 26, heads to Mexico to join the Mexicali team and take pitcher Jeff Samardzija's spot on the roster.
No other mention of Samardzija in the article (which is about Diamond). I guess he got his innings in.