Paxton exited Thursday's start with a left pectoral strain.
The lefty was pulled from Thursday's outing after grabbing at his upper chest area, which caused the Mariners' training staff to come out for a mound visit. Pectoral muscles are responsible for assisting with movements of the shoulder blade, so this could result in a DL stint. Paxton's status should come into focus in the coming days as he goes through more tests and is further evaluated.