Cubs Roster & Staff
Transactions
| Date | Transaction |
| 08/31/25 | Chicago Cubs signed free agent CF Billy Hamilton to a minor league contract. |
| 08/31/25 | Chicago Cubs designated LHP Tom Cosgrove for assignment. |
| 08/31/25 | Chicago Cubs optioned LHP Jordan Wicks to Iowa Cubs. |
| 08/31/25 | Chicago Cubs recalled RHP Porter Hodge from Iowa Cubs. |
| 08/31/25 | Chicago Cubs claimed RHP Aaron Civale off waivers from Chicago White Sox. |
| 08/28/25 | Chicago Cubs placed RHP Jameson Taillon on the 15-day injured list retroactive to August 25, 2025. Left groin strain. |
| 08/28/25 | Chicago Cubs recalled RHP Javier Assad from Iowa Cubs. |
| 08/27/25 | Chicago Cubs sent RHP Eli Morgan on a rehab assignment to Iowa Cubs. |
| 08/26/25 | Chicago Cubs signed free agent LHP Austin Gomber to a minor league contract. |
| 08/25/25 | Chicago Cubs signed free agent LHP Lazaro Mena to a minor league contract. |
| 08/23/25 | Chicago Cubs recalled LHP Jordan Wicks from Iowa Cubs. |
| 08/23/25 | Chicago Cubs optioned RHP Javier Assad to Iowa Cubs. |
| 08/22/25 | Chicago Cubs placed RHP Ryan Brasier on the 15-day injured list. Left groin strain. |
| 08/22/25 | Chicago Cubs recalled RHP Javier Assad from Iowa Cubs. |
| 08/20/25 | Chicago Cubs sent RHP Eli Morgan on a rehab assignment to South Bend Cubs. |
| 08/20/25 | Chicago Cubs sent RHP Eli Morgan on a rehab assignment to South Bend Cubs. |
| 08/19/25 | Chicago Cubs activated RHP Jameson Taillon from the 15-day injured list. |
| 08/19/25 | Chicago Cubs optioned RHP Gavin Hollowell to Iowa Cubs. |
| 08/19/25 | Chicago Cubs optioned LHP Tom Cosgrove to Iowa Cubs. |
| 08/19/25 | Chicago Cubs recalled LHP Tom Cosgrove from Iowa Cubs. |
| 08/19/25 | Chicago Cubs optioned LHP Luke Little to Iowa Cubs. |
| 08/18/25 | Chicago Cubs optioned RHP Javier Assad to Iowa Cubs. |
| 08/18/25 | Chicago Cubs recalled LHP Luke Little from Iowa Cubs. |
| 08/18/25 | Chicago Cubs recalled RHP Gavin Hollowell from Iowa Cubs. |
| 08/14/25 | Chicago Cubs placed C Miguel Amaya on the 10-day injured list. Left ankle sprain. |
| 08/14/25 | Chicago Cubs recalled RF Owen Caissie from Iowa Cubs. |
| 08/13/25 | Chicago Cubs released 3B Jon Berti. |
| 08/12/25 | Chicago Cubs activated RHP Javier Assad from the 60-day injured list. |
| 08/12/25 | Chicago Cubs designated 3B Jon Berti for assignment. |
| 08/12/25 | Chicago Cubs activated C Miguel Amaya from the 60-day injured list. |
| 08/12/25 | Chicago Cubs optioned RHP Nate Pearson to Iowa Cubs. |
| 08/11/25 | Chicago Cubs optioned RHP Nate Pearson to Iowa Cubs. |
| 08/09/25 | 3B Nicky Lopez assigned to Chicago Cubs. |
| 08/08/25 | Chicago Cubs signed free agent LF Forrest Wall to a minor league contract. |
| 08/07/25 | Chicago Cubs signed free agent LF Forrest Wall to a minor league contract. |
| 08/05/25 | Chicago Cubs placed RHP Michael Soroka on the 15-day injured list. Right shoulder strain. |
| 08/05/25 | Minnesota Twins claimed RHP Brooks Kriske off waivers from Chicago Cubs. |
| 08/05/25 | Chicago Cubs recalled RHP Nate Pearson from Iowa Cubs. |
| 08/03/25 | Chicago Cubs released RHP Chris Flexen. |
| 08/03/25 | LHP Drew Pomeranz changed number to 45. |
| 08/03/25 | C Reese McGuire changed number to 20. |
| 08/03/25 | RHP Ryan Brasier changed number to 54. |
| 08/03/25 | 1B Michael Busch changed number to 29. |
| 08/03/25 | 2B Nico Hoerner changed number to 2. |
| 08/03/25 | SS Dansby Swanson changed number to 7. |
| 08/03/25 | RHP Daniel Palencia changed number to 48. |
| 08/03/25 | RHP Colin Rea changed number to 53. |
| 08/03/25 | LF Ian Happ changed number to 8. |
| 08/03/25 | RHP Ben Brown changed number to 32. |
| 08/03/25 | LF Willi Castro changed number to 1. |
| 08/03/25 | C Carson Kelly changed number to 15. |
| 08/03/25 | Chicago Cubs sent RHP Jameson Taillon on a rehab assignment to Iowa Cubs. |
| 08/03/25 | CF Pete Crow-Armstrong changed number to 4. |
| 08/03/25 | LHP Shota Imanaga changed number to 18. |
| 08/03/25 | RHP Cade Horton changed number to 22. |
| 08/03/25 | LHP Taylor Rogers changed number to 17. |
| 08/03/25 | 3B Matt Shaw changed number to 6. |
| 08/03/25 | RF Seiya Suzuki changed number to 27. |
| 08/03/25 | LHP Caleb Thielbar changed number to 24. |
| 08/03/25 | RF Kyle Tucker changed number to 30. |
| 08/03/25 | 1B Justin Turner changed number to 3. |
| 08/03/25 | RHP Michael Soroka changed number to 41. |
| 08/03/25 | RHP Brad Keller changed number to 40. |
| 08/03/25 | RHP Andrew Kittredge changed number to 59. |
| 08/03/25 | 3B Jon Berti changed number to 5. |
| 08/03/25 | LHP Matthew Boyd changed number to 16. |
| 08/03/25 | Baltimore Orioles claimed 3B Vidal Bruján off waivers from Chicago Cubs. |
| 08/02/25 | LHP Drew Pomeranz changed number to 23. |
| 08/02/25 | 1B Justin Turner changed number to 23. |
| 08/02/25 | LHP Taylor Rogers changed number to 23. |
| 08/02/25 | 3B Matt Shaw changed number to 23. |
| 08/02/25 | LF Willi Castro changed number to 23. |
| 08/02/25 | RF Seiya Suzuki changed number to 23. |
| 08/02/25 | RF Kyle Tucker changed number to 23. |
| 08/02/25 | RHP Andrew Kittredge changed number to 23. |
| 08/02/25 | RHP Brad Keller changed number to 23. |
| 08/02/25 | RHP Ben Brown changed number to 23. |
| 08/02/25 | 1B Michael Busch changed number to 23. |
| 08/02/25 | RHP Daniel Palencia changed number to 23. |
| 08/02/25 | LF Ian Happ changed number to 23. |
| 08/02/25 | SS Dansby Swanson changed number to 23. |
| 08/02/25 | 2B Nico Hoerner changed number to 23. |
| 08/02/25 | RHP Cade Horton changed number to 23. |
| 08/02/25 | RHP Ryan Brasier changed number to 23. |
| 08/02/25 | C Carson Kelly changed number to 23. |
| 08/02/25 | Chicago Cubs designated RHP Brooks Kriske for assignment. |
| 08/02/25 | RHP Michael Soroka changed number to 23. |
| 08/02/25 | LHP Shota Imanaga changed number to 23. |
| 08/02/25 | 3B Jon Berti changed number to 23. |
| 08/02/25 | CF Pete Crow-Armstrong changed number to 23. |
| 08/02/25 | LHP Matthew Boyd changed number to 23. |
| 08/02/25 | LHP Caleb Thielbar changed number to 23. |
| 08/02/25 | C Reese McGuire changed number to 23. |
| 08/02/25 | RHP Colin Rea changed number to 23. |
| 08/02/25 | Chicago Cubs activated RHP Michael Soroka. |
| 08/01/25 | Chicago Cubs activated LF Willi Castro. |
| 08/01/25 | Chicago Cubs activated RHP Andrew Kittredge. |
| 08/01/25 | Chicago Cubs activated LHP Taylor Rogers. |
| 08/01/25 | Chicago Cubs released RHP Ryan Pressly. |
| 08/01/25 | Chicago Cubs optioned RHP Gavin Hollowell to Iowa Cubs. |
| 08/01/25 | Chicago Cubs optioned C Moisés Ballesteros to Iowa Cubs. |