Pirates Roster & Staff
Transactions
| Date | Transaction |
| 05/25/15 | Pittsburgh Pirates activated RHP Charlie Morton from the 15-day disabled list. |
| 05/25/15 | Pittsburgh Pirates designated RHP Radhames Liz for assignment. |
| 05/19/15 | Pittsburgh Pirates selected the contract of RF Jose Tabata from Indianapolis Indians. |
| 05/19/15 | Pittsburgh Pirates transferred SS Justin Sellers from the 15-day disabled list to the 60-day disabled list. |
| 05/18/15 | Pittsburgh Pirates optioned RHP Wilfredo Boscan to Indianapolis Indians. |
| 05/16/15 | Pittsburgh Pirates optioned 2B Steve Lombardozzi to Indianapolis Indians. |
| 05/16/15 | Pittsburgh Pirates selected the contract of Wilfredo Boscan from Indianapolis Indians. |
| 05/16/15 | Pittsburgh Pirates transferred RHP Brandon Cumpton from the 15-day disabled list to the 60-day disabled list. March 2015 Tommy John surgery |
| 05/15/15 | Pittsburgh Pirates optioned LHP Bobby LaFromboise to Indianapolis Indians. |
| 05/15/15 | Pittsburgh Pirates activated LHP Antonio Bastardo from the restricted list. |
| 05/14/15 | Pittsburgh Pirates placed LHP Antonio Bastardo on the restricted list. |
| 05/14/15 | Pittsburgh Pirates sent RHP Charlie Morton on a rehab assignment to Indianapolis Indians. |
| 05/11/15 | Pittsburgh Pirates placed LHP Antonio Bastardo on the paternity list. |
| 05/11/15 | Pittsburgh Pirates recalled Bobby LaFromboise from Indianapolis Indians. |
| 05/11/15 | Pittsburgh Pirates signed free agent LHP Oddy Nunez to a minor league contract. |
| 05/10/15 | Pittsburgh Pirates optioned LHP Jayson Aquino to Bradenton Marauders. |
| 05/10/15 | Pittsburgh Pirates signed free agent C Paul Brands to a minor league contract. |
| 05/10/15 | Toronto Blue Jays traded LHP Jayson Aquino to Pittsburgh Pirates for cash. |
| 05/08/15 | Pittsburgh Pirates sent RHP Charlie Morton on a rehab assignment to Altoona Curve. |
| 05/06/15 | Pittsburgh Pirates placed RF Andrew Lambo on the 15-day disabled list retroactive to May 4, 2015. Plantar fasciitis in his left foot |
| 05/06/15 | Pittsburgh Pirates selected the contract of Steve Lombardozzi from Indianapolis Indians. |
| 05/04/15 | Pittsburgh Pirates signed free agent RHP Robert Stock to a minor league contract. |