Athletics Roster & Staff
Transactions
| Date | Transaction |
| 12/22/25 | Athletics designated LHP Ken Waldichuk for assignment. |
| 12/22/25 | New York Mets traded 2B Jeff McNeil and cash to Athletics for RHP Yordan Rodriguez. |
| 12/22/25 | New York Mets traded 2B Jeff McNeil and cash to Athletics for RHP Yordan Rodriguez. |
| 12/20/25 | Athletics signed free agent RHP Nick Hernandez to a minor league contract. |
| 12/19/25 | Athletics signed free agent C Brian Serven to a minor league contract. |
| 12/19/25 | Athletics signed free agent OF Cade Marlowe to a minor league contract. |
| 12/18/25 | Athletics signed free agent C Bryan Lavastida to a minor league contract. |
| 12/17/25 | Athletics signed free agent RHP Mark Leiter Jr.. |
| 12/17/25 | Athletics signed free agent RHP Gustavo Rodriguez to a minor league contract. |
| 12/16/25 | Athletics signed free agent RHP Joel Kuhnel to a minor league contract. |
| 12/12/25 | Athletics signed free agent RHP Brooks Kriske to a minor league contract. |
| 12/12/25 | Athletics signed free agent 2B Michael Stefanic to a minor league contract. |
| 12/12/25 | Athletics signed free agent RHP JJ Goss to a minor league contract. |
| 12/10/25 | Athletics purchased contract of RHP Darlin Pinales in the Rule 5 Draft, AAA Phase. |
| 12/10/25 | Athletics purchased contract of RHP Ryan Watson in the Rule 5 Draft. |
| 12/10/25 | Minnesota Twins purchased contract of C Daniel Susac in the Rule 5 Draft. |
| 12/10/25 | Athletics purchased contract of RHP Jorge Marcheco in the Rule 5 Draft, AAA Phase. |
| 12/10/25 | New York Yankees purchased contract of C Abrahan Gutierrez in the Rule 5 Draft, AAA Phase. |
| 12/10/25 | Athletics purchased contract of RHP Abel Mercedes in the Rule 5 Draft, AAA Phase. |
| 12/10/25 | Athletics traded RHP Ryan Watson to Boston Red Sox for 2B Justin Riemer and cash. |
| 12/10/25 | Athletics traded RHP Ryan Watson to Boston Red Sox for 2B Justin Riemer and cash. |
| 12/05/25 | Athletics signed free agent RHP Santiago Valencia to a minor league contract. |
| 12/05/25 | Atlanta Braves claimed RHP Osvaldo Bido off waivers from Athletics. |
| 12/04/25 | Athletics signed free agent C Abrahan Gutierrez to a minor league contract. |