| Richard Panik was added to Senators. |
| Alex Lyon was added to Senators. |
| Patrik Elias was added to Senators. |
| Ashton Sautner was added to Senators. |
| TRADE : From Senators to Devils : Troy Brouwer. |
| Luca Sbisa was added to Senators. |
| Jiri Tlusty was added to Senators. |
| TRADE : From Senators to Wild : Anthony Salinitri (P). |
| Patrick Kudla was added to Senators. |
| Scott Glennie was released. |
| Nick Bonino was added to Senators. |
| Blake Wheeler was added to Senators. |
| Andrew Ference was added to Senators. |
| TRADE : From Ducks to Senators : Josh Gorges. |
| Senators claimed Ryan Murphy from waivers by Penguins for 0 €. |
| Senators paid 0 € to release Michael Ryder. |
| Nic Dowd was added to Senators. |
| Runners didn\'t make playoff for year 2017. |
| Senators paid 0 € to release Karri Ramo. |
| Kyle Pettit was added to Senators. |
