Walls is out of the lineup for Wednesday's game against the Mariners.
Walls will hit the bench for the series finale after starting each of the past three games, allowing Jose Caballero to pick up a start at shortstop. The Rays value Walls' glovework in the middle infield, but he's been one of the league's least productive hitters this season. Among the 378 players who have logged at least 150 plate appearances heading into Wednesday, Walls ranks 375th with a .493 OPS.