| Player | Position | Last Season | Birthdate | Country |
| O'Brien, Shane | D | 2012-2013 | 08/09/1983 | CAN |
| O'Reilly, Cal | C | 2011-2012 | 09/30/1986 | CAN |
| Olvecky, Peter | L | 2009-2010 | 10/11/1985 | SVK |
| Orszagh, Vladimir | L | 2005-2006 | 05/24/1977 | SVK |
| Ortmeyer, Jed | R | 2011-2012 | 09/03/1978 | USA |