(Peoria, AZ)  --  Seattle Mariners left-handed pitcher Roenis Elias is being optioned to Triple-A Tacoma.  The "Seattle Times" reports Elias, who had a solid rookie season last year, lost a battle for the final spot in the 2015 starting rotation with Taijuan [[ TIE-wahn ]] Walker.  Elias started five games during the pre-season, going oh-and-two with a six-point-75 ERA.