The right-hander, who was slowed this spring because of tightness in his shoulder, gave up two runs (one earned) on two hits and one walk over two innings and struck out two.
As of now, Carlos Villanueva is scheduled to start Wednesday for the Cubs against the Reds. The Cubs want to see how Arrieta feels after Saturday's outing before deciding whether he's ready to join the big league team or needs more rehab time.
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.