Looking to build on their latest extra-inning victory, the Diamondbacks hope to do a better job behind Corbin in Sunday's series finale against the visiting Colorado Rockies.Cody Ross delivered a sacrifice fly in the 10th to help Arizona (14-10) improve to 6-0 in extra-inning games with a 3-2 win over Colorado on Saturday. The Diamondbacks have won four of five, with the last three victories by 3-2 margins.Arizona needed extras to win the last two starts by Corbin (2-0, 1.71 ERA), who has given up five runs and struck out 20 in 26 1/3 innings in 2013.The left-hander allowed a run in seven innings and left with a one-run lead that the bullpen blew in the ninth of a 6-2, 12-inning win at Yankee Stadium on April 18. On Tuesday at San Francisco, he yielded two runs in 7 1-3, but his teammates could not hold a two-run cushion before the Diamondbacks won 6-4 in 11."It's a shame Patrick didn't get that win," manager Kirk Gibson told the Diamondbacks' official website. "We've got to clean that up."Ross had two RBIs and A.J. Pollock added three hits, including his third homer, Saturday as Arizona won despite giving up an early 2-0 lead. Pollock went 0 for 8 in the first two games of the set, but is batting .348 (8 for 23) against the Rockies this season.Corbin was 0-1 with an 11.00 ERA in two starts at Coors Field last year, but gave up a run in seven innings of 5-3 home win over the Rockies on Oct. 2.Wilin Rosario homered for one of his three hits and Troy Tulowitzki added two with an RBI for Colorado (15-9), which has dropped five of seven since winning eight straight. The Rockies went 1 for 9 with runners in scoring position and failed to take full advantage of seven walks from Arizona's Wade Miley."You miss that many opportunities, it's going to come back to haunt you," manager Walt Weiss said.Tulowitzki is batting .400 (12 for 30) with 12 RBIs during a nine-game hitting streak against the Diamondbacks.Colorado's Jon Garland (2-1, 4.68) takes the mound looking to bounce back after he allowed six runs, three homers and walked four in six innings of a 10-2 loss to Atlanta in the finale of a doubleheader Tuesday."I've maintained this whole time, if you don't make pitches, you're going to get hit," the right-hander told the Rockies' official website. "A lot of those pitches were up, didn't move. I was walking guys, putting guys on in front of hits. It was just a bad night overall."Garland, who spent part of 2009 with Arizona, is 3-3 with a 4.60 ERA in eight starts against the Diamondbacks. He has not faced them since 2010.The veteran won't have to face Arizona shortstop Didi Gregorius, who will miss a second straight game after he was hit on the helmet by a pitch in Friday's 6-3 loss. The rookie, who began the season on the disabled list with an elbow injury, is batting .407 (11 for 27) in seven games.