Cubs Roster & Staff
Transactions
| Date | Transaction |
| 08/31/15 | Chicago Cubs designated 3B Mike Olt for assignment. |
| 08/31/15 | Seattle Mariners traded cash and CF Austin Jackson to Chicago Cubs for Future Considerations and Player To Be Named Later. |
| 08/30/15 | Chicago Cubs sent RHP Neil Ramirez on a rehab assignment to Tennessee Smokies. |
| 08/28/15 | Chicago Cubs optioned LHP Zac Rosscup to Iowa Cubs. |
| 08/27/15 | Chicago Cubs designated RHP Brian Schlitter for assignment. |
| 08/27/15 | Seattle Mariners traded RHP Fernando Rodney to Chicago Cubs. |
| 08/26/15 | Chicago Cubs sent RHP Rafael Soriano on a rehab assignment to Iowa Cubs. |
| 08/26/15 | Chicago Cubs recalled CF Matt Szczur from Iowa Cubs. |
| 08/26/15 | Chicago Cubs signed free agent SS Yonathan Perlaza to a minor league contract. |
| 08/26/15 | C David Ross roster status changed by Chicago Cubs. |
| 08/25/15 | Chicago Cubs signed free agent C Henderson Perez to a minor league contract. |
| 08/25/15 | Chicago Cubs signed free agent OF Jose Gutierrez to a minor league contract. |
| 08/25/15 | Chicago Cubs signed free agent 2B Emilio Bonifacio to a minor league contract. |
| 08/24/15 | Chicago Cubs recalled 2B Tommy La Stella from Iowa Cubs. |
| 08/24/15 | Chicago Cubs signed free agent LF Quintin Berry to a minor league contract. |
| 08/24/15 | Chicago Cubs placed RF Jorge Soler on the 15-day disabled list. Oblique Strain |
| 08/24/15 | Chicago Cubs placed RHP Jason Motte on the 15-day disabled list. Right Shoulder Strain |
| 08/24/15 | Chicago Cubs recalled Zac Rosscup from Iowa Cubs. |
| 08/23/15 | Chicago Cubs signed free agent OF Jonathan Sierra to a minor league contract. |
| 08/23/15 | Chicago Cubs signed free agent SS Christopher Morel to a minor league contract. |
| 08/23/15 | Chicago Cubs signed free agent SS Aramis Ademan to a minor league contract. |
| 08/23/15 | Chicago Cubs signed free agent SS Luis Diaz to a minor league contract. |
| 08/23/15 | Chicago Cubs signed free agent LHP Brailyn Marquez to a minor league contract. |
| 08/23/15 | Chicago Cubs signed free agent RHP Hector Matos to a minor league contract. |
| 08/23/15 | Chicago Cubs signed free agent RHP Yunior Perez to a minor league contract. |
| 08/18/15 | Chicago Cubs signed free agent RHP Trevor Cahill to a minor league contract. |
| 08/14/15 | Chicago Cubs optioned LHP Zac Rosscup to Iowa Cubs. |
| 08/11/15 | Chicago Cubs optioned 2B Tommy La Stella to Iowa Cubs. |
| 08/11/15 | Chicago Cubs activated C David Ross from the bereavement list. |
| 08/10/15 | Chicago Cubs optioned CF Matt Szczur to Iowa Cubs. |
| 08/08/15 | Chicago Cubs recalled Matt Szczur from Iowa Cubs. |
| 08/08/15 | Chicago Cubs placed C David Ross on the bereavement list. |
| 08/07/15 | Chicago Cubs signed free agent OF Kwang-Min Kwon to a minor league contract. |
| 08/07/15 | Chicago Cubs optioned CF Matt Szczur to Iowa Cubs. |
| 08/07/15 | Chicago Cubs activated C Miguel Montero from the 15-day disabled list. |
| 08/05/15 | Chicago Cubs placed RHP Rafael Soriano on the 15-day disabled list retroactive to August 4, 2015. Right shoulder inflammation. |
| 08/05/15 | Chicago Cubs signed free agent LHP Clayton Richard. |
| 08/04/15 | Chicago Cubs sent C Taylor Teagarden outright to Iowa Cubs. |
| 08/04/15 | Chicago Cubs released LHP Clayton Richard. |
| 08/03/15 | Chicago Cubs recalled Matt Szczur from Iowa Cubs. |
| 08/03/15 | Chicago Cubs designated LHP Clayton Richard for assignment. |
| 08/03/15 | Toronto Blue Jays claimed RHP Ben Rowen off waivers from Chicago Cubs. |
| 08/03/15 | Chicago Cubs optioned LHP Tsuyoshi Wada to Iowa Cubs. |
| 08/02/15 | Chicago Cubs designated C Taylor Teagarden for assignment. |
| 08/02/15 | Chicago Cubs recalled LHP Clayton Richard from Iowa Cubs. |
| 08/02/15 | Chicago Cubs sent C Miguel Montero on a rehab assignment to Tennessee Smokies. |
| 08/01/15 | Chicago Cubs optioned RHP Yoervis Medina to Iowa Cubs. |
| 08/01/15 | Chicago Cubs activated RHP Dan Haren. |
| 08/01/15 | Chicago Cubs activated RHP Tommy Hunter. |