Cubs Roster & Staff
Transactions
| Date | Transaction |
| 12/18/25 | Chicago Cubs signed free agent 1B Tyler Austin. |
| 12/17/25 | Chicago Cubs signed free agent LHP Caleb Thielbar. |
| 12/16/25 | Chicago Cubs signed free agent LHP Hoby Milner. |
| 12/15/25 | Chicago Cubs signed free agent LHP Fenuel James to a minor league contract. |
| 12/15/25 | Chicago Cubs signed free agent RHP Esmerbin Guerrero to a minor league contract. |
| 12/14/25 | Chicago Cubs signed free agent RHP Ruben Torres to a minor league contract. |
| 12/14/25 | Chicago Cubs signed free agent C Johan Gomez to a minor league contract. |
| 12/12/25 | Chicago Cubs signed free agent RHP Collin Snider to a minor league contract. |
| 12/10/25 | Chicago Cubs purchased contract of RHP Adam Stone in the Rule 5 Draft, AAA Phase. |
| 12/10/25 | Chicago Cubs purchased contract of 3B Devin Ortiz in the Rule 5 Draft, AAA Phase. |
| 12/10/25 | Chicago Cubs purchased contract of RHP Zane Mills in the Rule 5 Draft, AAA Phase. |
| 12/04/25 | Chicago Cubs traded RHP Nico Zeglin to Houston Astros for cash. |
| 12/01/25 | Chicago Cubs signed free agent RHP Sam Mettert to a minor league contract. |