PEORIA, Ariz. — The final spot in the Mariners’ rotation appears to belong to right-hander Taijuan Walker after the club optioned lefty Roenis Elias on Sunday to Triple-A Tacoma in a series of roster moves.
Walker would complete a five-man unit headed by right-hander Felix Hernandez and offering a right/left balance with lefty James Paxton, righty Hisashi Iwakuma and lefty J.A. Happ.
“Those things have not been talked about yet from an official standpoint,” manager Lloyd McClendon said, “but Taijuan has thrown the ball extremely well.”
McClendon stopped just short …