The Mariners took advantage of an open date this week to make an adjustment to their starting rotation.
RHP Taijuan Walker will start Wednesday's game at San Diego, per the Tacoma News Tribune. Walker was originally scheduled to start Thursday.
Walker replaces Roenis Elias as Wednesday's starter. Manager Lloyd McClendon made the change, because he didn't want to start back-to-back lefthanders against San Diego. Southpaw Mike Montgomery starts Tuesday's game against the Padres.