On December 14, 1934, Kerr was acquired by the Rangers. It is with the Rangers where he is most notable for playing. He played six seasons for them, becoming the Rangers first regular goalie. He led New York to a Stanley Cup victory in 1940. That year, because of his 1.54 GAA and eight shutouts he was a First Team All-Star and won the Vezina Trophy. He also was a second team All-Star in 1938.