| Date | Player | Last Season Stats | Experience | Age | Old Team | New Team | Notes |
|---|---|---|---|---|---|---|---|
| 01-31-2024 | Cody Stashak (P) | 0-0, 26 K, 6.89, in 15.2 IP. | 4 | 29 | SF | SF | Minor League contract |
| 01-30-2024 | Nick Solak (OF/IF) | .242, 11 HR, 49 RBI in 458 AB. | 4 | 29 | DET | SEA | Minor League contract |
| 01-30-2024 | Dom Nunez (C) | .189, 10 HR, 33 RBI in 228 AB. | 3 | 29 | PIT | CLE | Minor League contract |
| 01-30-2024 | Andrew Suarez (P) | - | 3 | 31 | STL | BAL | Minor League contract |
| 01-30-2024 | Anthony Banda (P) | 2-2, 32 K, 4.28, in 33.2 IP. | 6 | 30 | WSH | CLE | Minor League contract |
| 01-30-2024 | Samad Taylor (IF) | Minor League | 0 | 25 | KC | SEA |
Traded
The Seattle Mariners acquired infielder Samad Taylor from the Kansas City Royals for a player to be named later or cash considerations.
|
| 01-30-2024 | Jose Rondon (OF/IF) | .262, 3 HR, 9 RBI in 80 AB. | 4 | 30 | NYM | Minor League contract | |
| 01-30-2024 | Greg Allen (OF) | .270, 0 HR, 2 RBI in 37 AB. | 6 | 31 | MIL | NYY | Minor League contract |
| 01-30-2024 | Justin Turner (DH/IF) | .278, 27 HR, 87 RBI in 533 AB. | 14 | 39 | BOS | TOR | one-year |
| 01-29-2024 | Joel Kuhnel (P) | Minor League | 3 | 29 | HOU | HOU | Minor League contract |
| 01-29-2024 | Aaron Hicks (OF) | .194, 4 HR, 14 RBI in 108 AB. | 10 | 34 | NYY | LAA | one-year |
| 01-29-2024 | Anthony DeSclafani (P) | 13-7, 152 K, 3.17, in 167.2 IP. | 8 | 34 | SEA | MIN |
Traded
The Seattle Mariners acquired infielder Jorge Polanco from the Minnesota Twins for pitchers Justin Topa, Anthony DeSclafani and Darren Bowen, outfielder Gabriel Gonzalez and cash.
|
| 01-29-2024 | Nick Meyer (C) | Minor League | 0 | 27 | NYM | TB | Minor League contract |
| 01-29-2024 | Richard Lovelady (P) | 2-0, 1 Sv,23 K, 3.48, in 20.2 IP. | 3 | 28 | OAK | CHC | Minor League contract |
| 01-29-2024 | Alfonso Rivas (1B/OF) | .318, 1 HR, 3 RBI in 44 AB. | 2 | 27 | LAA | STL | Released |
| 01-29-2024 | Gabriel Gonzalez (OF) | - | 0 | 20 | SEA | MIN |
Traded
The Seattle Mariners acquired infielder Jorge Polanco from the Minnesota Twins for pitchers Justin Topa, Anthony DeSclafani and Darren Bowen, outfielder Gabriel Gonzalez and cash.
|
| 01-29-2024 | Darren Bowen (P) | - | 0 | 23 | SEA | MIN |
Traded
The Seattle Mariners acquired infielder Jorge Polanco from the Minnesota Twins for pitchers Justin Topa, Anthony DeSclafani and Darren Bowen, outfielder Gabriel Gonzalez and cash.
|
| 01-29-2024 | Justin Topa (P) | 0-0, 1 K, 29.70, in 3.1 IP. | 3 | 33 | SEA | MIN |
Traded
The Seattle Mariners acquired infielder Jorge Polanco from the Minnesota Twins for pitchers Justin Topa, Anthony DeSclafani and Darren Bowen, outfielder Gabriel Gonzalez and cash.
|
| 01-29-2024 | Jorge Polanco (IF) | .269, 33 HR, 98 RBI in 588 AB. | 9 | 30 | MIN | SEA |
Traded
The Seattle Mariners acquired infielder Jorge Polanco from the Minnesota Twins for pitchers Justin Topa, Anthony DeSclafani and Darren Bowen, outfielder Gabriel Gonzalez and cash.
|
| 01-29-2024 | C.J. Hinojosa (IF) | Minor League | 0 | 29 | MIA | Minor League contract | |
| 01-29-2024 | Sam McWilliams (P) | Minor League | 0 | 28 | CHC | Minor League contract | |
| 01-29-2024 | Drew Strotman (P) | Minor League | 0 | 27 | SF | HOU | Minor League contract |
| 01-27-2024 | Adam Frazier (IF/OF) | .305, 5 HR, 43 RBI in 577 AB. | 7 | 32 | BAL | KC | one-year |
| 01-27-2024 | Adam Ottavino (P) | 7-3, 11 Sv,71 K, 4.21, in 62 IP. | 12 | 38 | NYM | NYM | one-year |
| 01-27-2024 | Hector Neris (P) | 4-7, 12 Sv,98 K, 3.63, in 74.1 IP. | 9 | 34 | HOU | CHC | one-year |
| 01-27-2024 | Carlos Carrasco (P) | 1-5, 50 K, 6.04, in 53.2 IP. | 13 | 37 | NYM | CLE | Minor League contract |
| 01-27-2024 | Alex Wood (P) | 10-4, 152 K, 3.83, in 138.2 IP. | 10 | 33 | SF | OAK | one-year |
| 01-27-2024 | Tyler Beede (P) | 0-0, 2 K, 27.00, in 1 IP. | 4 | 30 | CLE | Minor League contract | |
| 01-27-2024 | Chandler Seagle (C) | Minor League | 0 | 27 | SD | SD | Minor League contract |
| 01-26-2024 | Carlos Arroyo (IF) | Minor League | 0 | 22 | MIA | ATL | Minor League contract |
| 01-26-2024 | Travis Jankowski (OF) | .252, 1 HR, 10 RBI in 131 AB. | 8 | 32 | TEX | TEX | one-year |
| 01-26-2024 | Carl Edwards Jr. (P) | 0-0, 6 K, 11.12, in 5.2 IP. | 8 | 32 | WSH | CHC | Minor League contract |
| 01-26-2024 | Kevin Padlo (IF) | .077, 0 HR, 0 RBI in 13 AB. | 2 | 27 | LAA | LAD | Minor League contract |
| 01-26-2024 | Josh James (P) | 0-0, 8 K, 5.40, in 5 IP. | 4 | 31 | STL | Minor League contract | |
| 01-26-2024 | Michael Petersen (P) | - | 0 | 29 | COL | LAD | Minor League contract |
| 01-26-2024 | Josh Roberson (P) | Minor League | 0 | 27 | CHC | SD | Minor League contract |
| 01-26-2024 | Tyler Owens (P) | Minor League | 0 | 23 | ATL | TEX |
Traded
The Atlanta Braves acquired outfielder J.P. Martinez from the Texas Rangers for pitcher Tyler Owens.
|
| 01-26-2024 | Caleb Boushley (P) | Minor League | 0 | 30 | MIL | MIN | Minor League contract |
| 01-26-2024 | Josh Rogers (P) | 2-2, 22 K, 3.28, in 35.2 IP. | 4 | 29 | COL | COL | Minor League contract |
| 01-26-2024 | Tommy Romero (P) | Minor League | 1 | 26 | WSH | SF | Minor League contract |
| 01-26-2024 | T.J. McFarland (P) | 4-1, 21 K, 2.56, in 38.2 IP. | 10 | 34 | BAL | LAD | Minor League contract |
| 01-26-2024 | Matt Festa (P) | Minor League | 3 | 31 | SEA | SD | Minor League contract |
| 01-26-2024 | Elvis Alvarado (P) | Minor League | 0 | 25 | DET | MIA | Minor League contract |
| 01-26-2024 | Mason Ronan (P) | - | 0 | 24 | PHI | PHI | Minor League contract |
| 01-26-2024 | J.P. Martinez (OF) | Minor League | 0 | 28 | TEX | ATL |
Traded
The Atlanta Braves acquired outfielder J.P. Martinez from the Texas Rangers for pitcher Tyler Owens.
|
| 01-26-2024 | Anthony Vizcaya (P) | - | 0 | 30 | NYM | ATL | Minor League contract |
| 01-26-2024 | Lorenzo Cedrola (OF) | Minor League | 0 | 26 | NYM | CLE | Minor League contract |
| 01-26-2024 | Nick Hernandez (P) | Minor League | 0 | 29 | SD | SD | Minor League contract |
| 01-25-2024 | Ronald Guzman (1B/P) | .062, 1 HR, 1 RBI in 16 AB. | 5 | 29 | SF | BAL | Minor League contract |
| 01-25-2024 | David Robertson (P) | 0-0, 16 K, 4.50, in 12 IP. | 14 | 39 | MIA | TEX | one-year |