Judging by Jamie Moyer's recent struggles, the visiting Diamondbacks might have a good chance to start their first winning streak in a little more than two weeks Wednesday night.Arizona (16-21) is 3-10 over its last 13 but won 5-1 in Los Angeles on Tuesday as Justin Upton, Miguel Montero and Jason Kubel all singled in runs during the fifth inning."Guys have been loose, even though we've been going through tough times, and tonight we got rewarded with some results," manager Kirk Gibson said.Colorado had dropped nine of 10 before beating San Francisco 5-4 on Tuesday thanks to Marco Scutaro's tiebreaking home run in the ninth after his team blew a three-run lead. Troy Tulowitzki also went 2 for 5 and drove in a run one night after being hit by a foul ball from teammate Dexter Fowler while standing on the top step of the dugout."Losing is no fun," Scutaro said. "It gets tired real quickly. Hopefully this will spark us."The Rockies (14-21) will seek their first win streak since a three-game run April 17-20 when they welcome the Diamondbacks and try to help the 49-year-old Moyer (1-3, 4.66 ERA) get back on track.The left-hander became the oldest player to win a major league game April 17 when he allowed two unearned runs over seven innings to San Diego, but has struggled since.Moyer is 0-1 with a 6.43 ERA in his last four outings and has an 8.40 ERA in his last three. He gave up five runs over five innings Friday in Los Angeles while being handed his first defeat since April 12."It is frustrating, but that's the game of baseball," Moyer said. "It's a pitch here, a pitch there, a hitter here, a hitter there, a base hit ... it can change a game. It can allow a mediocre game to be a mediocre game, a decent game to turn into a poor game or a decent game to turn into a really good game."The 25-year veteran will make his 636th start against Patrick Corbin (2-1, 4.50), who will be making his fourth. The 22-year-old left-hander gave up a solo homer and two singles over seven innings in Friday's 5-1 win over San Francisco."One thing coming into today, I wanted to attack the hitters," he told the team's official website.Corbin, who split his first two starts while posting a 7.00 ERA, will make his first start against a Colorado team that's batting .282 and scoring 6.5 runs per game at home. The Rockies are hitting .219 with 3.2 runs per contest away from Denver.Moyer is 3-0 with a 0.92 ERA in his last three games against the Diamondbacks but hasn't faced them since Aug. 18, 2009.Arizona hasn't earned back-to-back victories since a three-game win streak April 29-May 1.