Donaldson left Wednesday's game with a jammed thumb, Shi Davidi of Sportsnet reports.
Michael Saunders was put in the game to fill Donaldson's DH spot. The club has Thursday off, so Donaldson should be considered day-to-day heading into Friday's contest against the Indians. Before getting hurt, Donaldson had gone 0-for-4 at the plate with two strikeouts.