(Sports Network) - Ace right-hander Roy Oswalt again looks for his first win since May 12 when the Houston Astros host the St. Louis Cardinals in the opener of a three-game series tonight at Minute Maid Park. Oswalt, a 15-game winner last season after earning 20 W's in 2005, opened this season at 6-2 but has since gone 0-2 with a no-decision in his last three starts. His most recent outing, on May 27 at Arizona, ended in an 8-4 loss after he allowed 10 hits and five earned runs in six innings. He earned his first win of 2007 against the Cardinals, scattering five hits over nine innings in a 5-1 victory on April 7 in Houston. Lifetime against St. Louis, he is 8-5 with a 3.17 earned run average in 20 appearances - 19 starts. Youngster Adam Wainwright goes for the Cardinals after having alternated wins and losses in his last four starts. The 25-year-old Georgian was a tough-luck loser last time out, allowing seven hits and two runs in seven innings while dropping a 7-2 decision to Washington. Previously, he'd allowed nine hits and two runs in 5 1/3 innings while downing Pittsburgh, 9-4. He defeated the Astros, 3-2, on May 4 in St. Louis, allowing seven hits and two runs in six innings. Lifetime against Houston, the converted reliever is 2-0 with a 2.53 ERA in eight appearances. On Thursday in Colorado, Juan Encarnacion laced a two-out, three-run double in a four-run sixth inning for the Cardinals, who strung back-to- back wins together on the road for the first time in nearly two months with a 7-3 victory over the Rockies at Coors Field. Gary Bennett finished 3-for-4 with two RBI for St. Louis, while Scott Rolen ended 2-for-3 with an RBI and scored twice. Brad Thompson (4-1), who has won three of his last four starts, allowed two runs on seven hits with two walks and two strikeouts over a career-high 7 1/3 innings for the Cards. In Houston, Lance Berkman belted a three-run homer and Woody Williams struck out a season-high nine batters as the Astros snapped a 10-game losing streak with a 10-2 rout of the Cincinnati Reds in the finale of a three-game set at Minute Maid Park. Williams (2-7) yielded two runs and seven hits with two walks in five innings for the Astros, who avoided matching the longest losing streak in franchise history. Mark Loretta went 4-for-5 with three runs scored and Craig Biggio finished 3- for-5 with two runs scored and an RBI for Houston, which matched a season-high with 16 hits. St. Louis has won four of six from the Astros this season, including two of three at Minute Maid Park.