PITTSBURGH (AP) -Carlos Quentin's two-run single in the eighth inning finished off Arizona's franchise record-tying comeback, and the Diamondbacks rallied from six runs down with the help of Pittsburgh's ineffective bullpen for a 9-8 victory Saturday night.
Tony Clark's pinch-hit grand slam in the seventh tied it for Arizona.
The Diamondbacks, averaging 2.9 runs while previously going 6-10 this month, had only two previous six-run comebacks in their 10-season history - on May 2, 2006, against the Dodgers and Sept. 15, 1998, against the Giants.
Arizona's five relievers limited Pittsburgh to one run after starter Micah Owings left following 2 2-3 wild innings, with Doug Slaten (1-0) getting his first career victory with a scoreless seventh.
Jose Valverde finished up in the ninth, throwing only four pitches for his 15th save in 17 chances.
Mark Reynolds had three hits, including his first career homer, and Conor Jackson added a solo shot to start the five-run rally in the seventh.
Pirates starter Tom Gorzelanny held Arizona to two runs during another effective start. He also helped himself during the Pirates' biggest inning of the season with a two-run single that helped them to a 7-1 lead during a six-run third.
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