 |
Player | Position | Former Team | New Team | Transaction date | Notes | |
| 1. | Alfonzo, Eliezer | C | SEA | COL | 1/26/11 | Minor league contract | |
| 2. | Bautista, Denny | RP | SF | SEA | 12/14/10 | Minor league contract | |
| 3. | Bay, Jason | OF | NYM | SEA | 12/08/12 | One-year contract | |
| 4. | Bradley, Milton | OF | SEA | --- | --- | Released | |
| 5. | Byrnes, Eric | OF | ARI | SEA | 1/29/10 | One-year contract | |
| 6. | Cintron, Alex | IF | SEA | --- | --- | Minor League free agent | |
| 7. | Colome, Jesus | RP | MIL | SEA | 2/10/10 | Signed Minor League contract | |
| 8. | Everidge, Tommy | 1B | OAK | SEA | 1/15/10 | Claimed off waivers | |
| 9. | Figgins, Chone | OF | SEA | MIA | 2/08/13 | Minor league contract | |
| 10. | Griffey, Ken | DH | SEA | SEA | 11/11/09 | One-year contract | |
| 11. | Gross, Gabe | OF | OAK | SEA | 2/04/11 | Minor league contract | |
| 12. | Jacobs, Mike | 1B | ARI | SEA | 12/20/12 | Minor league contract | |
| 13. | Johjima, Kenji | C | SEA | --- | --- | Opted out of contract, returned to Japan | |
| 14. | Messenger, Randy | RP | SEA | --- | --- | Minor League free agent | |
| 15. | Miller, Justin | RP | LAD | SEA | 11/17/10 | Minor league contract | |
| 16. | Millwood, Kevin | SP | SEA | --- | 2/03/13 | Announced retirement | |
| 17. | Morrow, Brandon | SP | SEA | TOR | 12/23/09 | Traded to Jays for Brandon League | |
| 18. | Olivo, Miguel | C | SEA | CIN | 2/01/13 | Minor league contract | |
| 19. | Owens, Jerry | OF | SEA | WSH | 12/08/09 | Minor League contract | |
| 20. | Petit, Yusmeiro | SP | ARI | SEA | 11/04/09 | Claimed off waivers | |
| 21. | Ray, Chris | RP | SEA | CLE | 1/12/12 | Minor league contract | |
| 22. | Shelton, Chris | IF | SEA | HOU | 12/08/09 | Minor League contract | |
| 23. | Shoppach, Kelly | C | NYM | SEA | 2/07/13 | One-year contract | |
| 24. | Silva, Carlos | SP | SEA | CHC | 12/18/09 | Traded for Milton Bradley | |
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