Signed as a free agent by Toronto, July 30, 1930. Mtl. Maroons also claimed Gallagher's rights. NHL ruled he was property of Mtl. Maroons, September 27, 1930. Traded to Detroit by Mtl. Maroons for Reg Noble, December 9, 1932. Missed majority of 1933-34 due to injuries suffered in an automobile accident, November, 1933. Loaned to Windsor (IHL) by Detroit and played games in Canada only because he was denied entry into the U.S.A., November 30, 1934. Traded to NY Americans by Detroit for $6,000, October 7, 1936. Traded to Detroit by NY Americans for cash, November 29, 1936. Traded to NY Americans by Detroit for $6,000, October 7, 1937.