Ruggiano was designated for assignment Thursday, Bob Dutton of the Tacoma News Tribune reports. With Mark Trumbo acquired in a trade that sent Welington Castillo to Arizona on Wednesday, the Mariners needed to replace Ruggiano with a backup catcher, Jesus Sucre. Ruggiano hasn't provided much at the plate this season, owning a .214/.321/.357 slash line through 70 at-bats. He does have a strong record against southpaws, and could thus draw some interest on waivers.