McDonald was removed from Monday's start against the Royals with an undisclosed injury, Evan Webeck of the California Post reports. He allowed three runs on four hits and two walks while striking out three over four innings prior to departing.
McDonald went out to warm up for the bottom of the fifth inning before motioning for a trainer to come out of the dugout, and he would walk off the mound following a brief conversation. The severity of McDonald's injury is unclear at this time.