With its offense still muddling along, Arizona could have a difficult time winning two in a row.The Diamondbacks will give rookie Mike Bolsinger an opportunity to stick in their much-maligned rotation Saturday night when they try to hand the Dodgers their fourth loss in five games.Arizona starters failed to record a quality start while posting a 9.93 ERA during a six-game losing streak before Wade Miley gave the club a much-needed lift Friday. He allowed one run and two hits over six-plus frames as the Diamondbacks (5-14) snapped the skid with a 4-2, 12-inning win at Chavez Ravine.Gerardo Parra had three hits and Miguel Montero homered before Aaron Hill delivered a two-run single in the top of the 12th for the Diamondbacks' first win in six meetings with the Dodgers (10-7) this season.Even with those timely hits, Arizona's lineup has produced just nine runs and batted .197 over the last four games. The Diamondbacks also are hitting .190 with runners in scoring position on the season.Anaheim native Mark Trumbo, who was given Friday off, has gone 3 for 36 with one homer over his last nine games.Arizona hopes to put up some runs to make things easier on Bolsinger in his first career start. The right-hander replaces Trevor Cahill, who went 0-4 with a 9.17 ERA before earning his first career save Friday.Bolsinger, a 15th-round draft pick in 2010, went 2-0 with a 1.42 ERA at Triple-A Reno before making his first big-league appearance Monday. He was able to get some of the jitters out of the way, allowing two runs and six hits over three innings of relief in a 7-3 home loss to the New York Mets."It just seems the game gets faster here," Bolsinger told MLB's official website. "There's more going on. You've got to be aware of it and make sure you slow it down."Scott Van Slyke and Juan Uribe supplied the only offense Friday with solo home runs for the Dodgers, who have totaled seven runs while dropping three of four. Uribe, whose blast tied the contest in the bottom of the ninth, is 10 for 25 with three homers over a six-game hitting streak.Adrian Gonzalez, riding a 13-game hitting streak overall, has gone 8 for 17 with three homers and 10 RBIs in his last four against the Diamondbacks.Dan Haren (2-0, 2.04), who pitched for the Diamondbacks from 2008-10, allowed two runs over 12 innings in his first two starts. However, he wasn't as sharp Sunday when he gave up three runs and nine hits over 5 2/3 frames in an 8-6 win at Arizona."I was able to get through it," Haren said. "I don't know how. I face them again and I have to have better stuff than this."The right-hander has gone 2-1 with a 3.79 ERA in three career starts versus Arizona dating to his time with the Los Angeles Angels. Hill is 8 for 25 with two doubles, two triples and a home run and Chris Owings is 4 for 6 when facing Haren, though star Paul Goldschmidt only has one hit in six at-bats.Cody Ross went 0 for 5 Friday in his season debut after suffering a dislocated hip last August, while the Dodgers' Hanley Ramirez was 1 for 4 after getting a day off to nurse a bruised left hand.