The Pirates have recalled Josh Harrison from the DL and have DFA'd Josh Wall to make room on the roster. Harrison last played on July 5th against the Indians, when he injured his thumb sliding into second base. It turned out that he tore the ulnar collateral ligament in his left thumb, and would require surgery.
Here is the tweet that the Pirates sent out:
We have recalled @jhay_da_man from his rehab and reinstated him from the DL & RHP Josh Wall has been designated for assignment.