Castro smacked a RBI single off the Reds' Mike Leake in the third for career hit No. 552.
• Cubs pitcher Matt Garza will make his second Minor League rehab start on Wednesday for Double-A Tennessee, weather permitting.
Garza, who suffered a strained left lat Feb. 17 and missed all Spring Training games, was scheduled to throw 45-50 pitches.
He threw a simulated game on Friday at Miller Park when the Cubs were playing the Brewers.
• Top prospect Jorge Soler has a 10-game hitting streak at Class A Daytona, and was batting .378 this season entering Monday.
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.