Cubs Roster & Staff
Transactions
| Date | Transaction |
| 06/09/26 | Chicago Cubs placed RHP Trent Thornton on the paternity list. |
| 06/09/26 | Chicago Cubs placed RHP Jameson Taillon on the 15-day injured list retroactive to June 8, 2026. Strained left hamstring. |
| 06/09/26 | Chicago Cubs activated RF Matt Shaw from the 10-day injured list. |
| 06/09/26 | Chicago Cubs optioned DH Kevin Alcántara to Iowa Cubs. |
| 06/09/26 | Chicago Cubs recalled RHP Tyler Ferguson from Iowa Cubs. |
| 06/09/26 | Chicago Cubs recalled RHP Ethan Roberts from Iowa Cubs. |
| 06/08/26 | Chicago Cubs claimed RHP Eduarniel Núñez off waivers from Baltimore Orioles. |
| 06/08/26 | Chicago Cubs selected the contract of LHP Antoine Kelly from Iowa Cubs. |
| 06/07/26 | Los Angeles Dodgers traded LHP Antoine Kelly to Chicago Cubs for cash. |
| 06/06/26 | Chicago Cubs signed free agent RHP Andrew Wantz to a minor league contract. |
| 06/06/26 | Chicago Cubs optioned RHP Ethan Roberts to Iowa Cubs. |
| 06/06/26 | Chicago Cubs recalled RHP Javier Assad from Iowa Cubs. |
| 06/05/26 | Chicago Cubs activated RHP Edward Cabrera from the 15-day injured list. |
| 06/05/26 | Chicago Cubs optioned RHP Tyler Ferguson to Iowa Cubs. |
| 06/02/26 | Chicago Cubs sent RF Matt Shaw on a rehab assignment to Iowa Cubs. |
| 06/02/26 | Chicago Cubs optioned LHP Jordan Wicks to Iowa Cubs. |
| 06/02/26 | Chicago Cubs recalled RHP Tyler Ferguson from Iowa Cubs. |
| 06/01/26 | Chicago Cubs signed free agent LHP Aaron Bummer to a minor league contract. |