Johnny Gagnon trades
| New York Americans acquire | Date | Montreal Canadiens acquire | ||
|---|---|---|---|---|
 | Johnny Gagnon | January 3, 1940 | cash |  |
| Boston Bruins acquire | Date | Montreal Canadiens acquire | ||
|---|---|---|---|---|
 | cash | January 9, 1935 | Johnny Gagnon | |
| Boston Bruins acquire | Date | Montreal Canadiens acquire | ||
|---|---|---|---|---|
| Johnny Gagnon | October 2, 1934 | Joe Lamb | |