The Mariners outrighted Wilson to Triple-A Tacoma on Monday.
Wilson will remain in the Seattle organization after he went unclaimed by MLB's other 29 teams upon being exposed to waivers over the weekend. The 25-year-old got a brief cup of coffee in the majors earlier this season but has otherwise spent the entire campaign at Tacoma, with whom he's produced a .771 OPS over 282 plate appearances.