Severino was sent to Triple-A following his Tuesday start against the Red Sox in which he allowed five runs on seven hits in 4 1/3 innings. His previous three outings with New York came out of the bullpen.
The 22-year-old Severino is 1-7 with a 6.42 ERA in 11 appearances (eight starts) with the Yankees this season.
Cash Kruth is a reporter for MLB.com. Follow him on Twitter at @cashkruth. This story was not subject to the approval of Major League Baseball or its clubs.