Celtics' Kevin Garnett doubtful

The Boston Celtics will likely be juggling the lineup Wednesday against the Pistons.

Kevin Garnett is doubtful with a right hip flexor suffered against the Bulls on Sunday. He sat out practice, but coach Doc Rivers said the injury isn't serious.

"Kevin has a 50/50 chance (of playing Wednesday)," Rivers said. "We'll find out (Wednesday). It's nothing bad with Kevin. But (Celtics trainer Ed Lacerte) really suggested two days off and then he said today, 'Maybe three days off.' So we'll find that out (Wednesday)."

Mickael Pietrus is also doubtful after missing part of Tuesday's practice to get treatment on the right knee that was operated on this offseason.

Jermaine O'Neal could be returning to the lineup. He's missed the last two games with a left shoulder injury, but he participated in practice Tuesday.

"I just took a direct blow to the capsule part of the shoulder and really inflamed it to the point where I couldn't raise it," O'Neal said following Tuesday's session. "It's one of those things where you just come in and get treatment and get back to the point where you can get some more movement in it."

When asked whether he'll play Wednesday, O'Neal said: "Yeah, I was able to get through practice. It's still a little bit sore, but you try to give what you can give."

Power forward Brandon Bass missed the Bulls game with right knee soreness and admitted he originally hurt himself when the Celtics defeated the Magic in Orlando on Jan. 26. Bass made an effort to keep playing but will now sit out the recommended 10-14 days in order to rest and strengthen his knee. Bass will most likely return after the All-Star break later this month.

"I injured myself and I didn't want to sit out," Bass said. "I wanted to continue to play. Now I'm resting it and then I'm strengthening it up, and then I'll be ready to go.

"(My knee) swelled up and I put ice on it. I wanted to just keep going because I felt I could keep going, but it kept getting weaker and weaker. Talking with the staff, they thought it would be important for me to rest it, let it heal, and then strengthen it up, and then I'll be ready to go."

Keyon Dooling, who returned on Sunday following a nine-game absence with a hip injury, was held out of the middle portion of Tuesday's session by Rivers, who said he "struggled" as practice went on.

"I was a little worried, honestly, watching him practice," Rivers acknowledged, before noting he thinks Dooling will still suit up on Wednesday.

"I think he's going to play," Rivers said. "I think he wants to play. But I did think as practice went on he started trying to shy away from contact."

Information from ESPNBoston.com's Greg Payne was used in this report.