Walls isn't in the Rays' lineup for Saturday's game against Baltimore, Marc Topkin of the Tampa Bay Times reports.
Walls owns a .157/.283/.198 slash line through 145 plate appearances on the season, and he'll step out of the lineup against the formidable Corbin Burnes. Jose Caballero will shift to shortstop in Walls' place while Curtis Mead starts at the hot corner.