| Date/Season | Transaction |
|---|
| 1/29/2023 | Carolina Hurricanes send Ryan O'Marra (rental) to the Ottawa Senators for OTT 2031 Rnd 3, $100,000 |
| 1/21/2011 | Ottawa Senators send David Fischer, Geoff Platt, $2,500,000 to the Philadelphia Flyers for Brendan Mikkelson, Ryan O'Marra |
| 11/29/2010 | Philadelphia Flyers send Dylan Olsen, Jake Gardiner, Jeremy Morin, Kenny Ryan, NAS 2014 Rnd 4, PHI 2014 Rnd 4 to the Florida Panthers for Mikko Lehtonen, Ryan O'Marra, Tomas Kurka |
| 2008 | Drafted in the 1st round, 30th overall by Carolina (from Colorado) |
