Gosewisch cleared waivers and was outrighted to Triple-A Tacoma on Thursday, Bob Dutton of The Tacoma News Tribune reports.
Gosewisch slashed .071/.102/.071 through 11 games with the Mariners this season, and he owns a career .190 batting average across parts of four seasons, so the Mariners were able to pass him through waivers untouched. He'll continue to serve as organizational catching depth at Tacoma.