ST. LOUIS – Chris Carpenter threw a six-hitter and Ronnie Belliard had four RBIs, helping the St. Louis Cardinals take advantage of a fill-in starter in a 7-0 victory over the Houston Astros.

Juan Encarnacion had two RBIs for the Cardinals, who dominated in the first of seven meetings with the Astros over the final 20 games. St. Louis ended a three-game skid and leads the NL Central by five games over Cincinnati and six over the Astros, who beat them in the NLCS last year to go to the World Series.

Taylor Buchholz was recalled from Triple-A Round Rock to sub for Andy Pettitte, who was pushed back a day because of a heavy workload and a minor ankle sprain. Buchholz (6-10) made his first appearance for Houston since July 27 and allowed five runs in 3 1-3 innings.

Carpenter (14-6) is 4-0 with a 2.27 ERA in his last seven starts. He lowered his NL-leading ERA to 2.84 with his fourth compete game of the season and third shutout, which tied Arizona’s Brandon Webb for the major league lead.

Carpenter struck out six and walked two, raising his career record against Houston to 5-2 with a 2.52 ERA. He has 24 career complete games and 12 shutouts.

He had been 0-1 against the Astros this season while allowing nine runs in 14 innings. The Astros were shut out for the second straight game, and 13th time overall, after Adam Wainwright worked the ninth.

Carpenter, the NL Cy Young Award winner last year, has worked eight or more innings in five of his last six starts.

Belliard had been in an 0-for-20 slump before his RBI single off Buchholz in the third. His three-run triple off Fernando Nieve capped a five-run inning that put the Cardinals ahead 7-0.

Encarnacion had an RBI single in the third and drew a bases-loaded walk from Nieve in the fourth.

Astros shortstop Adam Everett committed two errors, one of them contributing to five unearned runs in the fourth. He lost his grip and double-pumped while preparing to throw on a grounder by Aaron Miles, and Miles ended up beating the throw with one out and none on.

Five of the next six batters reached safely.

Everett, who also misplayed a short hop on Carpenter’s liner up the middle in the second, has only seven errors. This was his fifth two-error game and first since May 1, 2005.

Notes: Carpenter has 35 victories the last two seasons, tied for most in the majors with Jon Garland of the White Sox. Carpenter also has only five walks in 61 1-3 innings over his last eight starts. … Buchholz’s outing ended a run of 12 straight games in which Astros starters allowed three runs or fewer, and one or fewer in eight of those games. … Encarnacion is 16-for-44 (.364) in his last 12 games with seven RBIs. … The last Cardinals pitcher to lead the league in ERA was Joe Magrane at 2.18 in 1988.

AP-ES-09-11-06 2248EDT