| Player | Position | Last Season | Birthdate | Country |
| O'Brien, Doug | D | 2005-2006 | 02/16/1984 | CAN |
| O'Brien, Shane | D | 2012-2013 | 08/09/1983 | CAN |
| Oberg, Evan | D | 2011-2012 | 02/16/1988 | CAN |
| Ohlund, Mattias | D | 2010-2011 | 09/09/1976 | SWE |
| Olvestad, Jimmie | L | 2002-2003 | 02/16/1980 | SWE |
| Osborne, Keith | R | 1992-1993 | 04/02/1969 | CAN |
| Ouellet, Michel | R | 2008-2009 | 03/05/1982 | CAN |