| Player | Position | Last Season | Birthdate | Country |
| O'Donnell, Sean | D | 2011-2012 | 10/13/1971 | CAN |
| O'Neill, Michael | G | 1996-1997 | 11/03/1967 | CAN |
| O'Reilly, Cal | C | 2011-2012 | 09/30/1986 | CAN |
| O'Sullivan, Patrick | C | 2011-2012 | 02/01/1985 | CAN |
| Odelein, Lyle | D | 2005-2006 | 07/21/1968 | CAN |
| Olausson, Fredrik | D | 2002-2003 | 10/05/1966 | SWE |
| Olczyk, Eddie | R | 1999-2000 | 08/16/1966 | USA |
| Oliver, David | R | 2005-2006 | 04/17/1971 | CAN |
| Osborne, Mark | L | 1994-1995 | 08/13/1961 | CAN |
| Osiecki, Mark | D | 1992-1993 | 07/23/1968 | USA |