The Pirates didn't enter the final day before the trade deadline looking for a starting pitcher, but the state of A.J. Burnett's elbow quickly made them change their mind.
The Pirates acquired left-hander J.A. Happ the Mariners on Friday after Burnett complained of elbow pain and was placed on the 15-day DL with inflammation following his third straight rough outing.
Pittsburgh also picked up Michael Morse from the Dodgers, hoping Morse's proven right-handed bat will give the Pirates a platoon option at first base to complement left-handed Pedro Alvarez.