Weathers was removed from Wednesday's game against the Diamondbacks with left arm soreness.
The 21-year-old delivered a scoreless first inning Wednesday, but he was visited by the athletic trainer while showing decreased velocity and was pulled after the frame. The severity of the injury remains unclear, but it could be another tough blow for an already depleted pitching staff. Weathers' status for his next turn through the rotation will remain up in the air until more information is available.