BOSTON -- Red Sox center fielder Mike Cameron is still having discomfort in his lower abdomen one week after being activated from the disabled list. The veteran underwent an MRI at Fenway Park before Tuesday's game, which he didn't play in. He will see a specialist and undergo more tests on Wednesday morning.

"We should have, hopefully, better information [Wednesday] where we can make a decision on the best way to go forward," said Red Sox manager Terry Francona. "[I] was back there with him for a while, with [Red Sox medical director] Tom Gill, and we were kind of walking through it. He'll be looked at again in the morning and we'll try to make a good judgment on where he is. That's kind of where we're at."

Cameron was out of action from April 19 to May 24. He is hopeful a return stint to the DL won't be necessary.

"I'll be good, man. I'll get some info," Cameron said. "It's precautionary. It's stopped me from doing a few things. I got an MRI today to make sure that everything was good. I'll go see the specialist tomorrow. We'll go on from there. This is checking my hernias. Deep, deep inner abdominal area stuff. I'll see the specialist tomorrow to make sure everything is in place."

It seemed like Cameron had made a breakthrough on Sunday, when he belted three hits, including a pair of doubles and drove in his first two runs in a Red Sox uniform. But during Monday's off-day, Cameron felt soreness, and it hadn't gone away by Tuesday.

This time, the pain was in a different spot.

"I don't know, though, if that's good or bad," said Francona. "That's what we're trying to figure out. The area that he originally was hurting in is feeling OK. It could just be simply general soreness, which I think we're all hoping."

The Red Sox have had a tough go of it with their starting outfield this season. Jacoby Ellsbury suffered a hairline fracture of four left ribs in an April 11 collision with Adrian Beltre and didn't return to the lineup until May 22. Ellsbury's comeback was short-lived, as he went back on the DL on Friday because of recurring problems.

Ellsbury took batting practice on Tuesday, but there's still no timetable for his return. He is eligible to be activated on June 15.

"He went down today and hit in the cage," Francona said. "It's kind of basically what he can handle, not just on a daily basis, but then repeating it and taking it out and competing. We've run I think every test imaginable to rule out something. What it comes down to, we've said it all along, is symptoms. If it hurts and gets in the way, it hurts and it gets in the way. You have to treat it accordingly."

Francona rooting for Doc, Celtics

BOSTON -- Doc Rivers started coaching the Boston Celtics just a few months after Terry Francona became the manager of the Red Sox in 2004. The two men formed a fairly quick bond and have stayed in touch throughout the years with text messages, phone messages and occasional visits when Francona goes to a Celtics game or Rivers finds time to take in a Sox game.

With the Celtics set to play the Lakers in the NBA Finals -- which begins on Thursday night in Los Angeles -- Francona has been thinking about Rivers and the Celtics.

"We've become pretty good friends," Francona said. "With Doc, our schedules don't permit going out to dinner or anything like that. But in my opinion, Doc has an amazing way [of communicating]. Some of the messages I get, the timing on them is incredible and what they say."

So even on Friday night, after the Red Sox had taken a 12-5 beating at the hands of the Royals, Francona made it a point to leave Rivers a message regarding the Celts' victory over the Orlando Magic that same night in the clinching Game 6 of the Eastern Conference Finals.

"I was driving and they were getting down towards the end [of the game], but it wasn't the end, so I purposely sat at the rotary because I knew I'd lose my service when I got to the house," Francona said. "I wanted to be one of the first ones to tell them congratulations, but I didn't want to do it too quick. So I endured all the people [getting impatient], then sent him a note saying, 'Hey -- way to go.' Because I do care. I'm a big fan of the Celtics, but I'm a big Doc fan. I like the way he does everything."

The Red Sox had Rivers as a guest speaker at their Rookie Development Program back in January.

"I can't take credit for that. I think our guys really wanted him to come in and talk, and he said he'd do it for me," Francona said. "I think our kids enjoyed it. They probably didn't enjoy it more than me. I loved it. When he talks, he has a lot to say that's really interesting."

Francona has won two World Series championships since coming to Boston. Rivers is four Finals victories away from tying his friend. The Celtics won the championship two years ago.

Kalish promoted to Triple-A Pawtucket

BOSTON -- Ryan Kalish, one of the top outfield prospects the Red Sox have, is now just one stop from Fenway Park. The 22-year-old left-handed hitter was promoted to Triple-A Pawtucket on Tuesday.

Kalish hit .293 in 41 games for Double-A Portland. He led the Sea Dogs in runs (35), homers (eight) and stolen bases (13). He was ranked fourth in the Eastern League in walks (28) and on-base percentage (.404) and was fifth in stolen bases.

In April, first baseman Lars Anderson, another one of Boston's highly-touted positional prospects, went from Portland to Pawtucket.

Worth noting

When will ace Josh Beckett (lower back strain) resume throwing? That answer should become more clear on Wednesday, when the ace will huddle with manager Terry Francona, pitching coach John Farrell and possibly general manager Theo Epstein. The Red Sox put the brakes on Beckett late last week when he had trouble repeating his delivery. The righty has been out since May 19. ... One of the most underrated performers on the Red Sox so far this season? Reliever Manny Delcarmen, who has limited opponents to a .128 batting average. He has allowed just one hit over his past six outings. ... Second baseman Dustin Pedroia snapped an 0-for-17 stretch with a double in his final at-bat on Tuesday night. Pedroia is hitting .254. "Yeah, I don't think worried is the word," said Francona. "He leaves everything out there. No, I don't really worry about him on the fact of his performance. I worry that he tries too hard. He always plays the game."