Mariners Roster & Staff
Transactions
| Date | Transaction |
| 05/28/10 | Seattle Mariners placed C Josh Bard on the 15-day disabled list retroactive to May 27, 2010. Strained left calf. |
| 05/28/10 | Seattle Mariners designated 3B Jack Hannahan for assignment. |
| 05/28/10 | Seattle Mariners recalled C Eliezer Alfonzo from Tacoma Rainiers. |
| 05/28/10 | Blake Ochoa assigned to Tacoma Rainiers from Seattle Mariners. |
| 05/27/10 | Josh Bard roster status changed by Seattle Mariners. |
| 05/19/10 | Seattle Mariners optioned Sean White to Tacoma Rainiers. |
| 05/19/10 | Seattle Mariners activated LF Milton Bradley from the restricted list. |
| 05/19/10 | Seattle Mariners transferred LHP Erik Bedard from the 15-day disabled list to the 60-day disabled list. |
| 05/16/10 | Adam Moore roster status changed by Seattle Mariners. |
| 05/16/10 | Seattle Mariners selected the contract of C Josh Bard from Tacoma Rainiers. |
| 05/16/10 | Erik Bedard roster status changed by Seattle Mariners. |
| 05/12/10 | Seattle Mariners recalled Matt Tuiasosopo from Tacoma Rainiers. |
| 05/12/10 | Seattle Mariners placed SS Jack Wilson on the 15-day disabled list retroactive to May 6, 2010. Right hamstring strain. |
| 05/06/10 | Seattle Mariners recalled Michael Saunders from Tacoma Rainiers. |
| 05/06/10 | Seattle Mariners placed RF Milton Bradley on the restricted list. |
| 05/06/10 | Seattle Mariners activated CF Michael Saunders. |
| 05/05/10 | Seattle Mariners recalled RHP Shawn Kelley from Tacoma Rainiers. |
| 05/05/10 | Mark Lowe roster status changed by Seattle Mariners. |
| 05/04/10 | Seattle Mariners selected the contract of LF Ryan Langerhans from Tacoma Rainiers. |
| 05/04/10 | Seattle Mariners selected the contract of SS Josh Wilson from Tacoma Rainiers. |
| 05/03/10 | Seattle Mariners released LF Eric Byrnes. |
| 05/03/10 | Seattle Mariners signed free agent 1B Miguel Brito to a minor league contract. |
| 05/03/10 | Seattle Mariners released RHP Ricky Orta. |
| 05/03/10 | Seattle Mariners optioned Matt Tuiasosopo to Tacoma Rainiers. |
| 05/01/10 | Seattle Mariners signed free agent RHP Osmel Morales to a minor league contract. |
| 05/01/10 | Seattle Mariners signed free agent IF Alexy Palma to a minor league contract. |