Cubs manager Joe Maddon wasn't sure if Russell would be available for the start of the Interleague series at U.S. Cellular Field.
"It's nothing debilitating," Maddon said of Russell's foot. "I'll find out tomorrow when I talk to him."
Russell ended the Cubs' fourth with a pop up to his Brewers counterpart, Jonathan Villar. Cubs athletic trainer PJ Mainville came onto the field to talk to Russell before the bottom of the inning began with Maddon. Russell was removed from the game, and Javier Baez took over at shortstop.
Carrie Muskat has covered the Cubs since 1987, and for MLB.com since 2001. She writes a blog, Muskat Ramblings. You can follow her on Twitter @CarrieMuskat and listen to her podcast. This story was not subject to the approval of Major League Baseball or its clubs.