Farmer will stretch out as a starter in spring training, Jason Beck of MLB.com reports.
Farmer made 20 starts at Triple-A Toledo last season, but he was primarily used as a reliever with the MLB club. The Detroit rotation will likely consist of Justin Verlander, Michael Fulmer, Jordan Zimmermann, Daniel Norris and Matt Boyd when camp breaks, meaning Farmer could start the year in Toledo again. He provides depth should other starters struggle or go down to injury.