Schafer was outrighted to Triple-A Rochester on Monday, Mike Berardino of the St. Paul Pioneer Press reports.
Despite posting decent results in the minor leagues, Schafer hasn't ever translated that success to the major leagues, leaving the Twins no choice but to boot him off the 40-man roster. The outfielder could reject the assignment and elect free agency, although he'll likely act as organizational depth no matter where he ends up.