Walls (undisclosed) was scratched from the Rays' starting lineup against the Mariners on Saturday, Ryan Bass of FanDuel Sports Network Sun reports.
Walls was originally slated to start at shortstop. Now that he's out of the lineup, Ha-Seong Kim will move to shortstop while Tristan Gray starts at the keystone. The Rays are likely to provide an update on Walls after Saturday's game.