The Pirates won the opener 4-0 and have captured four of their last five games. If they can win two of their final four, they will avoid a 100-loss season.
Doumit doubled home two runs in the third, then scored on a single by Brandon Moss. Doumit had an RBI single in the seventh and came around to score on a fielder's choice grounder from Moss.
The Pittsburgh catcher added a solo homer in the ninth.
Jeff Karstens (4-5) was credited with the win after giving up two runs on five hits in five innings. The loss went to Carlos Zambrano (9-7), who struck out six but gave up four runs on six hits in six frames.
Copyright 2009 by United Press International.