Cubs Roster & Staff
Transactions
| Date | Transaction |
| 08/21/26 | Chicago Cubs activated RHP Daniel Palencia from the 60-day injured list. |
| 08/21/26 | Chicago Cubs designated 2B Owen Miller for assignment. |
| 08/21/26 | Chicago Cubs activated 3B Gabriel Arias. |
| 08/21/26 | Chicago Cubs optioned RHP Javier Assad to Iowa Cubs. |
| 08/19/26 | Chicago Cubs transferred RHP Phil Maton from the 15-day injured list to the 60-day injured list. Right knee tendinitis. |
| 08/19/26 | Chicago Cubs sent RF Matt Shaw on a rehab assignment to Iowa Cubs. |
| 08/19/26 | Chicago Cubs signed free agent SS Jackson Cluff to a minor league contract. |
| 08/19/26 | Chicago Cubs claimed 3B Gabriel Arias off waivers from New York Mets. |
| 08/17/26 | Chicago Cubs placed SS Dansby Swanson on the 10-day injured list. Left oblique strain. |
| 08/17/26 | Chicago Cubs placed RHP Daniel Palencia on the 60-day injured list. Right elbow inflammation. |
| 08/17/26 | Chicago Cubs placed RHP Edward Cabrera on the 15-day injured list. Right middle finger blister. |
| 08/17/26 | Chicago Cubs recalled OF Kevin Alcántara from Iowa Cubs. |
| 08/17/26 | Chicago Cubs selected the contract of 2B Owen Miller from Iowa Cubs. |
| 08/17/26 | Chicago Cubs recalled RHP Javier Assad from Iowa Cubs. |
| 08/17/26 | Chicago Cubs optioned 2B James Triantos to Iowa Cubs. |
| 08/16/26 | Chicago Cubs activated RHP Edward Cabrera from the 15-day injured list. |
| 08/16/26 | Chicago Cubs sent RHP Daniel Palencia on a rehab assignment to Iowa Cubs. |
| 08/16/26 | Chicago Cubs optioned RHP Javier Assad to Iowa Cubs. |
| 08/15/26 | Chicago Cubs sent RHP Shelby Miller on a rehab assignment to Iowa Cubs. |
| 08/12/26 | Chicago Cubs sent RHP Shelby Miller on a rehab assignment to Knoxville Smokies. |
| 08/11/26 | Chicago Cubs sent RHP Daniel Palencia on a rehab assignment to Knoxville Smokies. |
| 08/11/26 | Chicago Cubs sent RHP Edward Cabrera on a rehab assignment to Knoxville Smokies. |
| 08/09/26 | Chicago Cubs sent RHP Shelby Miller on a rehab assignment to Iowa Cubs. |
| 08/09/26 | Chicago Cubs optioned RHP Ethan Roberts to Iowa Cubs. |
| 08/08/26 | Chicago Cubs activated RHP Clay Holmes from the 60-day injured list. |
| 08/08/26 | Chicago Cubs optioned LHP Braxton Garrett to Iowa Cubs. |
| 08/07/26 | Chicago Cubs sent RHP Jake Woodford outright to Iowa Cubs. |
| 08/06/26 | Chicago Cubs signed free agent RHP Andrew Wantz to a minor league contract. |
| 08/06/26 | Chicago Cubs recalled LHP Braxton Garrett from Iowa Cubs. |
| 08/06/26 | Chicago Cubs optioned RHP Tyler Ferguson to Iowa Cubs. |
| 08/06/26 | Kansas City Royals claimed LHP Luke Little off waivers from Chicago Cubs. |
| 08/05/26 | Chicago Cubs activated RHP Kevin Gausman. |
| 08/05/26 | Chicago Cubs sent RHP Daniel Palencia on a rehab assignment to Iowa Cubs. |
| 08/05/26 | Chicago Cubs optioned LHP Antoine Kelly to Iowa Cubs. |
| 08/04/26 | Chicago Cubs designated RHP Jake Woodford for assignment. |
| 08/04/26 | Chicago Cubs activated RHP Ryan Zeferjahn. |
| 08/04/26 | Chicago Cubs activated LF Tyrone Taylor. |
| 08/04/26 | Chicago Cubs optioned DH Kevin Alcántara to Iowa Cubs. |
| 08/03/26 | Chicago Cubs placed RHP Clay Holmes on the 60-day injured list. |
| 08/03/26 | Chicago Cubs designated LHP Luke Little for assignment. |
| 08/03/26 | LF Tyrone Taylor roster status changed by Chicago Cubs. |
| 08/03/26 | Chicago Cubs transferred RHP Ben Brown from the 15-day injured list to the 60-day injured list. Neck strain. |
| 08/03/26 | RHP Ryan Zeferjahn roster status changed by Chicago Cubs. |
| 08/03/26 | Los Angeles Angels traded RHP Ryan Zeferjahn to Chicago Cubs for C Moisés Ballesteros and RHP Mason McGwire. |
| 08/03/26 | Miami Marlins traded LHP Braxton Garrett to Chicago Cubs for 3B Jonathon Long and RHP Jace Beck. |
| 08/03/26 | Miami Marlins traded LHP Braxton Garrett to Chicago Cubs for 3B Jonathon Long and RHP Jace Beck. |
| 08/03/26 | Miami Marlins traded LHP Braxton Garrett to Chicago Cubs for 3B Jonathon Long and RHP Jace Beck. |
| 08/03/26 | Chicago Cubs recalled DH Kevin Alcántara from Iowa Cubs. |
| 08/03/26 | Los Angeles Angels traded RHP Ryan Zeferjahn to Chicago Cubs for C Moisés Ballesteros and RHP Mason McGwire. |
| 08/03/26 | Los Angeles Angels traded RHP Ryan Zeferjahn to Chicago Cubs for C Moisés Ballesteros and RHP Mason McGwire. |
| 08/03/26 | Chicago Cubs traded SS Jefferson Rojas to New York Mets for RHP Clay Holmes and LF Tyrone Taylor. |
| 08/03/26 | Chicago Cubs optioned CF Justin Dean to Iowa Cubs. |
| 08/03/26 | Chicago Cubs traded SS Jefferson Rojas to New York Mets for RHP Clay Holmes and LF Tyrone Taylor. |
| 08/03/26 | Chicago Cubs traded SS Jefferson Rojas to New York Mets for RHP Clay Holmes and LF Tyrone Taylor. |
| 08/02/26 | RHP Kevin Gausman roster status changed by Chicago Cubs. |
| 08/02/26 | Toronto Blue Jays traded RHP Kevin Gausman to Chicago Cubs for CF Brett Bateman and SS Ty Southisene. |
| 08/02/26 | Chicago Cubs traded RHP Jameson Taillon and cash to Toronto Blue Jays for Player To Be Named Later. |
| 08/02/26 | Toronto Blue Jays traded RHP Kevin Gausman to Chicago Cubs for CF Brett Bateman and SS Ty Southisene. |
| 08/02/26 | Toronto Blue Jays traded RHP Kevin Gausman to Chicago Cubs for CF Brett Bateman and SS Ty Southisene. |
| 08/01/26 | Chicago Cubs sent RHP Andrew Wantz outright to Iowa Cubs. |