Farmer will be recalled from Triple-A Toledo on Friday.
After appearing in 10 games as a reliever for the Tigers throughout the season, Farmer has a 3.94 ERA and 1.38 WHIP. However, he's used as a starter with Toledo, where he owns a 3.96 ERA and 1.34 WHIP. Upon his return to the big club, he'll likely return to the bullpen.