Walker isn't in the lineup for Thursday's game against the Rangers, Brian McTaggart of MLB.com reports.
Walker will take a seat on the bench to begin Thursday's series finale after going 1-for-12 with a three-run homer and an additional run scored over the first three games of the series. His absence will cause Isaac Paredes to shift to first base, giving Braden Shewmake a start at third and Brice Matthews a start at second.