Castro is out of the lineup for Sunday's game against the Twins, Chris McCosky of The Detroit News reports.
The lefty-hitting Castro will sit with southpaw Martin Perez on the hill for Minnesota, but the 25-year-old looks like he may have a temporary hold on a large-side platoon role while Josh Harrison (shoulder) on the shelf. Castro had started six of the Tigers' previous eight games, with his last four appearances coming at second base. He's only managed five hits in 22 at-bats since his promotion from Triple-A Toledo, however, so Castro hasn't done enough yet to warrant much intrigue in the fantasy realm.