Mariners Roster & Staff
Transactions
| Date | Transaction |
| 01/29/14 | Seattle Mariners traded RF Carlos Peguero to Kansas City Royals for Player To Be Named Later. |
| 01/29/14 | Seattle Mariners signed free agent RHP Scott Baker to a minor league contract and invited him to spring training. |
| 01/24/14 | Seattle Mariners signed free agent RHP Mark Rogers to a minor league contract and invited him to spring training. |
| 01/24/14 | Seattle Mariners signed free agent LHP Joe Beimel to a minor league contract and invited him to spring training. |
| 01/23/14 | Seattle Mariners signed free agent CF Endy Chavez to a minor league contract and invited him to spring training. |
| 01/17/14 | Seattle Mariners signed free agent C Manuel Pina to a minor league contract and invited him to spring training. |
| 01/17/14 | Seattle Mariners signed free agent RHP Logan Kensing to a minor league contract and invited him to spring training. |
| 01/16/14 | Seattle Mariners designated Carlos Peguero for assignment. |
| 01/16/14 | Seattle Mariners signed free agent C John Buck. |
| 01/15/14 | Seattle Mariners signed free agent RHP Moises Hernandez to a minor league contract. |
| 01/14/14 | Seattle Mariners invited non-roster RHP Dominic Leone to spring training. |
| 01/14/14 | Stephen Kohlscheen assigned to Seattle Mariners. |
| 01/14/14 | Seattle Mariners invited non-roster LHP Nick Hill to spring training. |
| 01/14/14 | Seattle Mariners invited non-roster LHP James Gillheeney to spring training. |
| 01/14/14 | Seattle Mariners invited non-roster LHP Roenis Elias to spring training. |
| 01/14/14 | Seattle Mariners invited non-roster RHP Andrew Carraway to spring training. |
| 01/14/14 | Seattle Mariners invited non-roster 3B Nate Tenbrink to spring training. |
| 01/14/14 | Seattle Mariners invited non-roster C John Hicks to spring training. |
| 01/14/14 | Seattle Mariners invited non-roster RHP Carson Smith to spring training. |
| 01/14/14 | Seattle Mariners invited non-roster SS Gabriel Noriega to spring training. |
| 01/14/14 | Seattle Mariners invited non-roster SS Chris Taylor to spring training. |
| 01/14/14 | Seattle Mariners invited non-roster C Mike Dowd to spring training. |
| 01/14/14 | Ty Kelly assigned to Seattle Mariners. |
| 01/06/14 | Seattle Mariners signed free agent C Humberto Quintero to a minor league contract and invited him to spring training. |
| 01/02/14 | Seattle Mariners signed free agent RHP Ramon Ramirez to a minor league contract and invited him to spring training. |