Swanson was removed from Sunday's game against the Cardinals midway through his first at-bat in the bottom of the third inning due to an apparent injury, Andy Martinez of Marquee Sports Network reports.
Following his first swing of the afternoon, Swanson immediately felt discomfort and left the game with a trainer by his side. James Triantos came on to pinch hit for Swanson and will likely cover second base for the remainder of the contest while Nico Hoerner shifts over to Swanson's spot in the field at shortstop. The Cubs should provide official word on his injury later in the day.