Pittsburgh ? Oliver Perez earned substantial praise from both dugouts.

Russ Ortiz landed something even better: his 100th major league victory.

Ortiz shut out Pittsburgh for seven innings to win his sixth straight decision and Chipper Jones homered for Atlanta’s only run off Perez, leading the Braves past the Pirates 1-0 Wednesday night.

The game matched two streaking pitchers in Ortiz and Perez, neither of whom had lost since June, and two of baseball’s hottest teams — the Braves have won 21 of 28, the Pirates 21 of 29.

Ortiz (12-6) improved to 7-0 against Pittsburgh in 10 career starts despite allowing at least one baserunner in every inning. The Pirates had nine hits off Ortiz and 11 overall, only to strand 11 runners after scoring 36 runs in their previous five games.

“If you had told me I’d be able to get 100 wins in the big leagues, I didn’t know how long I would even last,” Ortiz said.

“I just feel very fortunate. I’ve been on some good teams that gave me an opportunity to win — like tonight, somebody had to do something for us to win and Chipper came up with the home run.”

The left-handed Perez (6-5), fast developing into one of the NL’s best starters, was more in command than Ortiz except for one pitch — Jones’ 14th homer, a solo shot to left field with one out in the fourth.

“When a guy’s throwing as good as that kid was, you hope for more but you know that may hold up,” Braves manager Bobby Cox said. “I’m sure that was what Russ was thinking.”

He was.

“I think everyone sensed it was going to be tough to score more runs,” Ortiz said.

Except for the homer, Perez didn’t allow a runner to reach second until Eli Marrero tripled in the ninth. Perez struck out 10 and walked five in 8 1-3 innings in his sixth double-digit strikeout game this season and the 11th of his career. Perez’s average of 10.9 strikeouts per nine innings leads the majors.

“I certainly am glad we had Russ on the mound for this matchup because you had to know that guy (Perez) wasn’t going to give up too many runs,” Jones said. “He’s the closest thing to Randy Johnson you’ll see. He’s a gem. He’s only 22 years old and he’s still developing, but he can throw it 97 miles per hour and he’s got a developing changeup.”

Ortiz, who trails only 13-game winner Jason Schmidt of San Francisco in victories among NL starters, finished an unbeaten July by going 5-0 in six starts.

Expos 7, Mets 4

Montreal — Tony Batista homered and drove in two runs, and Nick Johnson hit a go-ahead RBI double in the fifth inning. Brian Schneider had two RBIs for the Expos, who have won six of seven.

T.J. Tucker (1-1) allowed one hit in a scoreless two-thirds of an inning, and Luis Ayala pitched a perfect eighth. Chad Cordero got three outs for his 10th save in 11 opportunities.

Brewers 6, Cubs 3

Milwaukee — Chris Capuano pitched effectively into the seventh inning, and Bill Hall and Ben Grieve homered to help Milwaukee snap a four-game losing streak. The Brewers beat Cubs ace Kerry Wood for just their second win in 10 games.

Wood (5-4), making his fourth start since being activated from the disabled list, allowed five runs and seven hits in six innings.

Astros 6, D-backs 1

Houston — Roger Clemens struck out eight and allowed one run in seven innings, leading Houston over Arizona. Clemens (12-3) allowed only five hits and recorded his 322nd win. Jeff Kent hit a two-run homer in the third and Jeff Bagwell followed with a solo shot.

Cardinals 11, Reds 10

Cincinnati — Scott Rolen hit two of St. Louis’ four homers, sending the Reds to their eighth straight loss. Jim Edmonds homered in all three games of the series sweep. Cardinals right-hander Jeff Suppan walked a career-high 10 in 4-plus innings.

Marlins 6, Phillies 3

Miami — Mother Nature and Hee Seop Choi made it another miserable night in Miami for the Philadelphia Phillies, who endured two rain delays before losing again to Florida. Choi hit a tiebreaking three-run homer in the eighth inning.

Rockies 5, Dodgers 4

Denver — Aaron Miles hit a tiebreaking single off Guillermo Mota in the eighth inning and Jeromy Burnitz homered in his sixth straight home game. Steve Reed (2-2) allowed a run and two hits in two innings to earn the win.

Padres 9, Giants 4

San Diego — Sean Burroughs had a two-run single and Ryan Klesko added a two-run double in a five-run sixth inning. Terrence Long went 3-for-4 with two doubles and a triple, and scored three runs.