| Player | Position | Last Season | Birthdate | Country |
| O'Brien, Dennis | D | 1979-1980 | 06/10/1949 | CAN |
| O'Shea, Danny | C | 1972-1973 | 06/15/1945 | CAN |
| Odelein, Lyle | D | 2005-2006 | 07/21/1968 | CAN |
| Oleksiak, Jamie | D | 2012-2013 | 12/21/1992 | CAN |
| Oliver, David | R | 2005-2006 | 04/17/1971 | CAN |
| Oliver, Murray | C | 1974-1975 | 11/14/1937 | CAN |
| Orban, Bill | C | 1969-1970 | 02/20/1944 | CAN |
| Osiecki, Mark | D | 1992-1993 | 07/23/1968 | USA |
| Ott, Steve | C | 2012-2013 | 08/19/1982 | CAN |