With the Cubs trying to secure a playoff spot, Maddon wanted to get red-hot rookie catcher Kyle Schwarber's bat in the lineup against right-handed pitchers. On Friday, Schwarber started in left field, outfielder Chris Coghlan moved to second and Addison Russell switched to shortstop. Maddon employed the same lineup Saturday.
How long Castro, 25, will be benched has not been determined.