HOUSTON -- Right-hander Bud Norris is set to rejoin the Astros rotation, but when he will make his return to action isn't yet known.

Norris, who has been on the disabled list since May 24 with biceps tendinitis, threw six scoreless innings Tuesday night in a rehab outing at Triple-A Round Rock. He posted a 3.06 ERA in three rehab starts for the Express.

"I just located the ball down a lot more," Norris said. "The mistakes I made last time were up. I really worked on locating down in the strike zone and it really worked out for me."

Astros manager Brad Mills said Norris' next start will be with the Astros, but he wanted to wait to announce when it would happen. Norris was 2-5 with a 6.80 ERA in nine starts for Houston this season.

"We want to talk to some people who saw him pitch and talk to some of our starters first," Mills said when asked when Norris would be plugged into the rotation.

Bourgeois gets first starting nod with Astros

HOUSTON -- Houston native Jason Bourgeois made his first start in an Astros uniform Wednesday, starting in center field in place of childhood friend and teammate Michael Bourn. Bourgeois hit .345 with 10 doubles, five homers and 28 RBIs and 18 steals this year at Triple-A Round Rock before being called up Sunday.

"This is a dream come true, and I'm ready for it," said Bourgeois, who left between 25 and 30 tickets for family and friends. "Any time you get an opportunity to play in the big leagues, it's a great opportunity, but when you do it in front of the hometown, it's pretty special."

Bourn is hitting .156 against left-handers this year, so manager Brad Mills opted to give Bourgeois a shot in center Wednesday against Giants left-hander Barry Zito. He singled off the southpaw in his first at-bat.

"We want to get him in the lineup," Mills said. "We don't want to call a guy up and he sits four or five days before he gets a chance to start. Facing a lefty, it's a good matchup for him and for us. We get another guy out there who can run and has some athletic ability to play center field."

Bourgeois, claimed off waivers by the Astros last October, is a career .200 hitter in 40 Major League at-bats with the White Sox in 2009 and Brewers last year. He was originally drafted in the second round in 2000 by the Texas Rangers.

Astros skipper thinks Oswalt's an All-Star

HOUSTON -- Astros pitcher Roy Oswalt has put up numbers worthy of consideration of the All-Star Game, despite his 4-9 record. Oswalt has posted a 3.08 ERA in 15 starts, including 13 quality starts, and has struck out 94 batters in 99 1/3 innings.

Houston manager Brad Mills believes Oswalt is All-Star worthy and said he'd even be willing to place a call to Philadelphia Phillies manager Charlie Manuel to stump for his ace. Manuel will manage the NL this year and will help pick the NL pitchers.

"That would be nice," said Oswalt, a three-time All-Star. "A lot of times they go on numbers and not really look at quality. It would be nice. I haven't been there since '06. Any time a manager sticks up for you is big. I told him no matter what, I'd take the ball any day. Any time you have a manager on your side, it's good."

Mills said he's been impressed with Oswalt.

"He's pitched like an All-Star and he's pitched like he's deserved to be on there, there's no doubt," he said. "The way he's handled things on the field and off the field, he's been an All-Star."

Worth noting

Right-hander Casey Daigle and catcher Kevin Cash, both of whom were designated for assignment following Sunday's game, cleared waivers and accepted their Minor League assignments. They will report to Triple-A Round Rock. Outfielder Cory Sullivan also cleared waivers, but opted for free agency. ... The Astros signed two more Draft picks Wednesday: left-hander Evan Grills, a 10th-round pick from Canada, and outfielder Kellen Kiilsgaard, a 30th-round pick from Stanford. Houston has signed 28 of 52 draft picks.