Cubs Roster & Staff
Transactions
| Date | Transaction |
| 06/30/26 | Chicago Cubs sent RHP Vince Velasquez outright to Iowa Cubs. |
| 06/29/26 | Chicago Cubs placed RHP Ethan Roberts on the 15-day injured list. right forearm inflammation. |
| 06/29/26 | Chicago Cubs placed RF Matt Shaw on the 10-day injured list. left-hand sprain. |
| 06/29/26 | Chicago Cubs recalled RHP Gavin Hollowell from Iowa Cubs. |
| 06/29/26 | Chicago Cubs recalled DH Kevin Alcántara from Iowa Cubs. |
| 06/28/26 | Chicago Cubs designated RHP Vince Velasquez for assignment. |
| 06/28/26 | Chicago Cubs recalled LHP Jordan Wicks from Iowa Cubs. |
| 06/28/26 | Baltimore Orioles claimed RHP Yosver Zulueta off waivers from Chicago Cubs. |
| 06/27/26 | Chicago Cubs placed LHP Hoby Milner on the 15-day injured list retroactive to June 26, 2026. Appendicitis. |
| 06/27/26 | Chicago Cubs optioned RHP Jayden Murray to Iowa Cubs. |
| 06/27/26 | Chicago Cubs recalled RHP Tyler Ferguson from Iowa Cubs. |
| 06/26/26 | Chicago Cubs placed RHP Phil Maton on the 15-day injured list. Right knee tendinitis. |
| 06/26/26 | Chicago Cubs activated LHP David Peterson. |
| 06/25/26 | Chicago Cubs activated LHP Matthew Boyd from the 15-day injured list. |
| 06/25/26 | Chicago Cubs designated RHP Yosver Zulueta for assignment. |
| 06/25/26 | New York Mets traded LHP David Peterson to Chicago Cubs for 3B Cole Mathis. |
| 06/25/26 | Chicago Cubs optioned RHP Tyler Ferguson to Iowa Cubs. |
| 06/25/26 | New York Mets traded LHP David Peterson to Chicago Cubs for 3B Cole Mathis. |
| 06/25/26 | Chicago Cubs optioned RHP Gavin Hollowell to Iowa Cubs. |
| 06/24/26 | Chicago Cubs placed RHP Edward Cabrera on the 15-day injured list. Left hamstring strain. |
| 06/24/26 | Chicago Cubs placed RHP Ben Brown on the 15-day injured list retroactive to June 21, 2026. Neck strain. |
| 06/24/26 | Chicago Cubs designated RHP Christian Roa for assignment. |
| 06/24/26 | Chicago Cubs designated RHP Eduarniel Núñez for assignment. |
| 06/24/26 | Chicago Cubs claimed RHP Bryse Wilson off waivers from Philadelphia Phillies. |
| 06/24/26 | Chicago Cubs recalled RHP Tyler Ferguson from Iowa Cubs. |
| 06/24/26 | Chicago Cubs selected the contract of RHP Vince Velasquez from Iowa Cubs. |
| 06/24/26 | Chicago Cubs recalled RHP Gavin Hollowell from Iowa Cubs. |
| 06/24/26 | Chicago Cubs sent LHP Luis Peralta outright to Iowa Cubs. |
| 06/23/26 | Chicago Cubs activated RHP Jayden Murray. |
| 06/23/26 | Chicago Cubs optioned RHP Gavin Hollowell to Iowa Cubs. |
| 06/22/26 | Chicago Cubs signed free agent RHP Jhon Cabral to a minor league contract. |
| 06/22/26 | Chicago Cubs signed free agent LHP Drew Pomeranz to a minor league contract. |
| 06/20/26 | Chicago Cubs sent LHP Matthew Boyd on a rehab assignment to South Bend Cubs. |
| 06/20/26 | Chicago Cubs designated LHP Luis Peralta for assignment. |
| 06/20/26 | Chicago Cubs sent LHP Matthew Boyd on a rehab assignment to South Bend Cubs. |
| 06/20/26 | Houston Astros traded RHP Jayden Murray to Chicago Cubs for 1B Cameron Sisneros. |
| 06/20/26 | Houston Astros traded RHP Jayden Murray to Chicago Cubs for 1B Cameron Sisneros. |
| 06/19/26 | Chicago Cubs recalled CF Justin Dean from Iowa Cubs. |
| 06/18/26 | Chicago Cubs optioned DH Moisés Ballesteros to Iowa Cubs. |
| 06/17/26 | Chicago Cubs sent LHP Doug Nikhazy outright to Iowa Cubs. |
| 06/16/26 | Chicago Cubs placed RHP Daniel Palencia on the 15-day injured list. Right elbow inflammation. |
| 06/16/26 | Chicago Cubs recalled RHP Gavin Hollowell from Iowa Cubs. |
| 06/15/26 | Chicago Cubs designated LHP Doug Nikhazy for assignment. |
| 06/15/26 | Chicago Cubs optioned RHP Yosver Zulueta to Iowa Cubs. |
| 06/15/26 | Seattle Mariners traded RHP Yosver Zulueta to Chicago Cubs for cash. |
| 06/12/26 | Chicago Cubs activated RHP Trent Thornton from the paternity list. |
| 06/12/26 | Chicago Cubs optioned RHP Tyler Ferguson to Iowa Cubs. |
| 06/09/26 | Chicago Cubs activated RF Matt Shaw from the 10-day injured 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 placed RHP Trent Thornton on the paternity list. |
| 06/09/26 | Chicago Cubs recalled RHP Tyler Ferguson from Iowa Cubs. |
| 06/09/26 | Chicago Cubs recalled RHP Ethan Roberts from Iowa Cubs. |
| 06/09/26 | Chicago Cubs optioned DH Kevin Alcántara to 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 recalled RHP Javier Assad from Iowa Cubs. |
| 06/06/26 | Chicago Cubs optioned RHP Ethan Roberts to 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. |