Cubs Roster & Staff
Transactions
| Date | Transaction |
| 01/29/21 | Chicago Cubs signed free agent P Alfredo Zarraga. |
| 01/28/21 | Chicago Cubs signed free agent RHP Kohl Stewart. |
| 01/26/21 | Chicago Cubs signed free agent P Cristian Rojas. |
| 01/26/21 | Chicago Cubs signed free agent P Luis Reyes. |
| 01/25/21 | Chicago Cubs signed free agent OF Wilmer Bolivar. |
| 01/22/21 | Chicago Cubs signed free agent C Austin Romine. |
| 01/15/21 | Chicago Cubs signed free agent RHP Ronny Corniell to a minor league contract. |
| 01/15/21 | Chicago Cubs signed free agent C Moises Ballesteros to a minor league contract. |
| 01/15/21 | Chicago Cubs signed free agent RHP Kenneddy Delgado to a minor league contract. |
| 01/15/21 | Chicago Cubs signed free agent OF Daniel Ferreira to a minor league contract. |
| 01/15/21 | Chicago Cubs signed free agent C Carlos Ramos to a minor league contract. |
| 01/15/21 | Chicago Cubs signed free agent LHP Zhiorman Imbriano to a minor league contract. |
| 01/15/21 | Chicago Cubs signed free agent SS Pedro Ramirez to a minor league contract. |
| 01/15/21 | Chicago Cubs signed free agent SS Michael Arias to a minor league contract. |
| 01/15/21 | Chicago Cubs signed free agent RHP Gabriel Agrazal to a minor league contract. |
| 01/15/21 | Chicago Cubs signed free agent OF Oferman Hernandez to a minor league contract. |
| 01/15/21 | Chicago Cubs signed free agent C Fredy Montenegro to a minor league contract. |
| 01/15/21 | Chicago Cubs signed free agent RHP Joel Sierra to a minor league contract. |
| 01/15/21 | Chicago Cubs signed free agent RHP Adrian Martinez to a minor league contract. |
| 01/15/21 | Chicago Cubs signed free agent SS Cristian Hernandez to a minor league contract. |
| 01/15/21 | Chicago Cubs signed free agent RHP David Olivo to a minor league contract. |
| 01/15/21 | Chicago Cubs signed free agent RHP Welington Quintero to a minor league contract. |
| 01/05/21 | Chicago Cubs signed free agent 1B Patrick Wisdom to a minor league contract and invited him to spring training. |
| 01/05/21 | Chicago Cubs signed free agent 1B Patrick Wisdom to a minor league contract and invited him to spring training. |
| 01/05/21 | Chicago Cubs signed free agent 3B Patrick Wisdom. |
| 01/04/21 | Chicago Cubs released RHP Colin Rea. |
| 01/02/21 | Chicago Cubs signed free agent LF Nick Martini. |
| 01/02/21 | Chicago Cubs signed free agent OF Nick Martini to a minor league contract and invited him to spring training. |
| 01/02/21 | Chicago Cubs signed free agent OF Nick Martini to a minor league contract and invited him to spring training. |