Gerrit Cole upped his record to 3-0 by limiting the Diamondbacks to one run in 7 2/3 innings on Friday.
Mark Melancon pitched a flawless ninth in a three-run game for his fourth save against the Diamondbacks.
Josh Harrison had two hits, including a two-run double, Friday against the Diamondbacks.
Jeff Locke yielded four runs over five innings in a no-decision in Thursday's victory against the Cubs.
Gregory Polanco went 3-for-4 with a stolen base, an RBI single, and an RBI double to help the Pirates take down the Cubs on Thursday.
Mark Melancon retired the Cubs in order to pick up his third save of the season in Thursday's win over the Cubs.
Starling Marte (hand) is not in the Pirates' starting lineup Thursday against the Cubs.
Jordy Mercer (ribs) is in the Pirates' lineup Thursday.
Andrew McCutchen is out of the Pirates' starting lineup Thursday afternoon against the Cubs.
Gregory Polanco's solo home run was the deciding factor as the Pirates topped the Cubs 4-3 on Wednesday.
Tony Watson tossed a pair of scoreless innings for his first save of the season in Wednesday's win versus the Cubs.
Vance Worley limited the Cubs to one unearned run over 5 2/3 innings en route to a win on Wednesday.
X-rays on Starling Marte's right hand came back negative.
Starling Marte was removed from Wednesday's game against the Cubs after being hit by a pitch in the hand earlier in the game.
Pirates manager Clint Hurdle said Wednesday that he's sticking with Mark Melancon at closer.