Garcia (shoulder) has begun throwing at extended spring training in Arizona, MLB.com reports.
General manager Justin Hollander notes Garcia remains without a timeline for return, but there's still hope the right-hander will be able to pitch again at some point in September. Garcia was in the early stages of his Mariners tenure when the shoulder issue popped up, as he'd been acquired via trade from the Blue Jays on July 26 and had logged a total of nine innings across 10 appearances.