The Royals placed Seabold on the 15-day injured list Wednesday with a right lat strain.
Seabold had to be pulled from an appearance Tuesday against the Rays because of the injury. The severity of the strain is unclear, but even a mild one could result in an absence beyond the 15-day minimum. Seabold has pitched for three different teams this season, collecting a 5.25 ERA and 20:11 K:BB across 24 frames.