Cubs Roster & Staff
Transactions
| Date | Transaction |
| 05/30/13 | Chicago Cubs transferred RHP Kyuji Fujikawa from the 15-day disabled list to the 60-day disabled list. |
| 05/30/13 | Chicago Cubs optioned RHP Alex Burnett to Iowa Cubs. |
| 05/30/13 | Chicago Cubs selected the contract of RHP Zach Putnam from Iowa Cubs. |
| 05/29/13 | Chicago Cubs sent RHP Michael Bowden outright to Iowa Cubs. |
| 05/27/13 | Chicago Cubs placed RHP Kyuji Fujikawa on the 15-day disabled list. Muscular strain of right forearm |
| 05/27/13 | Chicago Cubs claimed Alex Burnett off waivers from Baltimore Orioles. |
| 05/27/13 | Alex Burnett roster status changed by Chicago Cubs. |
| 05/22/13 | Chicago Cubs recalled RHP Rafael Dolis from Iowa Cubs. |
| 05/22/13 | Chicago Cubs placed RHP Shawn Camp on the 15-day disabled list. Sprained right big toe. |
| 05/21/13 | Chicago Cubs claimed RHP Eduardo Sanchez off waivers from St. Louis Cardinals. |
| 05/21/13 | Chicago Cubs designated Michael Bowden for assignment. |
| 05/21/13 | Matt Garza roster status changed by Chicago Cubs. |
| 05/21/13 | Chicago Cubs optioned RHP Eduardo Sanchez to Iowa Cubs. |
| 05/11/13 | Matt Garza roster status changed by Tennessee Smokies. |
| 05/10/13 | Chicago Cubs activated RHP Kyuji Fujikawa from the 15-day disabled list. |
| 05/10/13 | Kyuji Fujikawa roster status changed by Chicago Cubs. |
| 05/10/13 | Kyuji Fujikawa roster status changed by Chicago Cubs. |
| 05/10/13 | RHP Kameron Loe elected free agency. |
| 05/09/13 | Chicago Cubs optioned Rafael Dolis to Iowa Cubs. |
| 05/09/13 | Chicago Cubs traded 2B Alberto Gonzalez to New York Yankees. |
| 05/09/13 | Chicago Cubs sent Kameron Loe outright to Iowa Cubs. |
| 05/08/13 | Chicago Cubs sent Ian Stewart outright to Iowa Cubs. |
| 05/07/13 | Chicago Cubs signed free agent 2B Humberto Garcia to a minor league contract. |
| 05/07/13 | Chicago Cubs sent RHP Kyuji Fujikawa on a rehab assignment to Tennessee Smokies. |
| 05/06/13 | Chicago Cubs recalled Rafael Dolis from Iowa Cubs. |
| 05/06/13 | Chicago Cubs optioned Dave Sappelt to Iowa Cubs. |
| 05/06/13 | Chicago Cubs designated Kameron Loe for assignment. |
| 05/06/13 | Chicago Cubs selected the contract of RF Ryan Sweeney from Iowa Cubs. |
| 05/05/13 | Chicago Cubs sent RHP Kyuji Fujikawa on a rehab assignment to Iowa Cubs. |
| 05/03/13 | Chicago Cubs optioned 3B Ian Stewart to Iowa Cubs. |
| 05/01/13 | Chicago Cubs signed free agent RHP Brohiglyn Rivero to a minor league contract. |
| 05/01/13 | Matt Garza roster status changed by Tennessee Smokies. |