Farmer was designated for assignment by the Tigers on Friday.
Farmer had been with the team since Opening Day but struggled through 12 relief appearances. He owns a 12.66 ERA and 2.25 WHIP through 10.2 innings, walking 16.1 percent of opposing batters while striking out just 17.9 percent. As a 30-year-old with a career 5.47 ERA, there's seemingly a good chance he passes through waivers and remains a part of the Tigers' organization.