The club will wait to announce the corresponding roster move to replace Ramirez, as Sunday's game could be postponed because of weather.
Ramirez can be away from the club for a maximum of three days under the rules of Major League Baseball's paternity list.
Rhett Bollinger is a reporter for MLB.com. Read his blog, Bollinger Beat, and follow him on Twitter @RhettBollinger. This story was not subject to the approval of Major League Baseball or its clubs.