MIAMI -- Right-hander Brian Moehler could be headed to a rehab assignment by the time the Astros leave South Florida following their three-game series against the Marlins.

Astros manager Brad Wills said Moehler, who has been on the disabled list since July 8 because of a right groin strain, is scheduled to throw another bullpen session on Saturday at Sun Life Stadium.

"If that goes well, we'll send him on a rehab," Mills said.

Moehler aggravated his groin injury two weeks ago while pitching a simulated game in St. Louis. He decided, however, not to have surgery and see if he can return to the mound this season. Moehler threw about 50 pitches in a simulated three-inning game on Thursday afternoon.

"He says he's been doing pretty well," Mills said of Moehler, who is 1-4 with a 4.92 ERA in 20 games, including eight starts, this season. "He's very happy with the way it's coming, as of right now."

Manzella back in fold as Astros shortstop

MIAMI -- Tommy Manzella returned to the Astros' starting lineup Friday for the first time in almost two months, as Houston opened a three-game series against the Marlins at Sun Life Stadium.

Manzella, who went on the disabled list on June 24 with a fractured left index finger, was activated from the 15-day DL on Thursday. Manzella started at shortstop and batted in the No. 7 spot. Fellow rookie Angel Sanchez, who replaced Manzella at shortstop after being acquired from the Red Sox on July 1, moved over to second base and batted in the No. 2 spot.

Astros manager Brad Mills said he decided to give Manzella, who is better defensively, the start at shortstop and move Sanchez to second to take advantage of his better bat, and to also give Geoff Blum a needed day off.

"Sanchez has played some at second base, so we'll throw him on the other side of the bag and give [Manzella] a chance to get out there," Mills said.

Manzella had a .366 batting average and one home run in 11 games during his extended Minor League rehab assignment. He said before Friday's game that he feels ready to return to the Major League club and contribute.

"I feel really good. I think I got 40 at-bats in my [rehab] assignment, which was really good," Manzella said. "I was able to work on some stuff, and I'm ready to go. I think I experienced every type of thing you're going to see in a game."

Manzella said it was somewhat frustrating to be sidelined for such an extended period, but understands the extended stint on the DL was for the best.

"I was pushing every day to try to do more, but the trainers and doctors have their job to do, too," Manzella said. "It took like six weeks to get cleared to even start to get back into a baseball routine and get on a rehab assignment. I just had to let the bone heal. The good thing is I was in shape and I kept my arm in shape."

Mills doesn't offer opinion in Clemens case

MIAMI -- Astros manager Brad Mills' reaction was subdued to the grand jury indictment against Roger Clemens.

Mills said he heard the news regarding the former Houston pitcher shortly before the club's game against the Mets on Thursday.

"I really didn't have the time to sit and think about it," Mills said prior to Friday's game against the Marlins. "I try not to think about it too much. Quite honestly, if I give a lot of opinions, I'd probably be out of school in doing that because I don't know a whole lot about everything that's going on.

"So that probably wouldn't be right, or fair, to that whole situation and probably to myself, because it would be strictly opinions without having a lot of knowledge of what's going on."