Devers is not in the starting lineup Monday against the Mariners, Jason Mastrodonato of the Boston Herald reports.
The top prospect wasn't expected to start this one with lefty James Paxton taking the hill for Seattle. Devers will likely begin acting on the large side of a platoon at third base, starting with Tuesday's game, when right-hander Felix Hernandez will take the hill for the opposition. On Monday night, Deven Marrero will pick up a start at the hot corner, which will likely be the case whenever a lefty is on the hill moving forward.