Dooling among five to sit out practice

Chris Forsberg/ESPN Boston

The Celtics huddle up at the end of Thursday's practice.WALTHAM, Mass. -- Quick hits after the Celtics practiced Thursday at HealthPoint:

* Injury update: Point guard Rajon Rondo sat out Thursday's session with soreness in the right wrist he injured Wednesday night against the Raptors. He was expected to undergo an MRI Thursday evening and is officially doubtful for Friday's game against the Suns. (Read more HERE). But he's not the only one dinged up. Here's a quick rundown on Boston's other ailing bodies:

* Keyon Dooling did not participate Thursday, despite intentions to do so. Said coach Doc Rivers: "We actually thought that Keyon would practice today, and couldn’t, so I guess that’s a setback. So I don’t know when [he'll be able to play]." Dooling, who had eyed a potential return Friday, now seems unlikely to dress for that game, even with Rondo likely out as well.

* Jermaine O'Neal did not participate Thursday because of a sore left wrist aggravated in Wednesday's win over the Raptors and his status for Friday is uncertain. Said Rivers: "I think he’ll play tomorrow, but we’re not actually sure about that either." O'Neal tore cartilage in his left wrist while taking a charge in Toronto in October of 2011, then aggravated that injury during Boston's Eastern Conference quarterfinal series against the New York Knicks last season.

* Chris Wilcox did not participate Thursday as he continues to work his way back from a left calf injury. Wilcox did watch the practice and rode an exercise bike at times during the session. The Celtics have not set a potential return date for him.

* Mickael Pietrus did not participate Thursday in what appeared to be a rest day. Pietrus, who is still working his way back after offseason knee surgery, has logged hefty minutes in his first two weeks with the Celtics.

* More injury chatter: Rivers admitted that minor injuries are a league-wide epidemic in this shortened campaign, but admitted it's been tough on his team thus far. "I think everybody is going through it. Our problem is, we’re going through it and we’re not ready yet -- we're not whole. We were not healthy in training camp, with Rondo’s sprained ankle and Paul [Pierce] not going through it [with a bruised heel]. Then the [lack of] conditioning. And now, you can see them coming around, but the injuries are starting to come in. That’s our biggest problem, you just want be whole and right at the same time, and we’ve yet to have that."

* Just Baby being Baby: Rivers said he still hasn't seen a video of Glen Davis' pants-dropping technical foul Wednesday night in Orlando, but admitted to hearing about it often on Thursday. "Trust me, I’ve heard about it," said Rivers. "I haven’t seen it. Nothing with Baby surprise me. Again, he doesn’t do it -- he’s Baby. You know, Manny [being Manny], Baby [being Baby]."

* Loose Balls: Both Avery Bradley and E'Twaun Moore stayed late to get up shots after the session. Rivers played coy on potential starter in the likelihood that Rondo can't go, but Bradley got first-team reps during the session and Rivers has often tried to preserve second-unit continuity (with Moore currently earning the majority of minutes as backup point guard due to Dooling's injury)... Moore on his confidence level: "I feel good playing. I hope I make a few shots the next couple games, but just playing point guard, trying to get everyone involved, getting the ball to the right spots, and just trying to play well." ... Bradley on his confidence level: "It’s high. Every time I get on the floor, what helps me is my defense, I just focus on not letting the team get a lead when going in, and I know that, when my name is called, I'm just going in and playing hard. That helps my confidence a lot."