Gilroy, last season's Hobey Baker winner as college player of the year, was the surprising choice to be sent to Hartford of the AHL on Thursday. He is second among NHL rookie defensemen with four goals and is tied for seventh with six points in 30 games.
He has gone four games without a point and was on the ice for both Blackhawks goals in New York's 2-1 overtime loss at Chicago Blackhawks on Wednesday night. The Rangers decided to keep Finnish rookie Ilkka Heikkinen on the roster instead.
The 25-year-old Gilroy, who starred at Boston University, signed a two-year, $3.5 million deal with the Rangers in the spring. His demotion gives New York space under the salary cap.