Jake Peavy upbeat after session

GLENDALE, Ariz. -- Chicago White Sox right-hander Jake Peavy had a light throwing session Tuesday morning that left him more optimistic than two days ago when his rotator cuff tendinitis was diagnosed.

Peavy threw on a back field for about 5-6 minutes at 30-40 feet and reported no significant discomfort.

"I felt quite a bit better than I did a few days ago so I was excited that things are certainly calming down," Peavy said. "The biggest thing is that we were [previously] doing things [natural], just trying to do everything by the book."

The right-hander has been trying to rehab his latissimus dorsi muscle that tore away from the bone in a start last season. He had surgery in July and didn't pitch again for the rest of 2010. Dr. Anthony Romeo, the Chicago surgeon who performed the surgery, will travel to Phoenix Wednesday to examine Peavy, USA Today reported.

Peavy made four consecutive spring starts but reported shoulder soreness after each of them. He threw 83 pitches in a Saturday start, and then the soreness was finally diagnosed as tendinitis.

"His shoulder told him that it was more than it could tolerate," Romeo said, according to USA Today.

Tuesday was Peavy's third day of taking anti-inflammatory medication.

"Certainly taking anti-inflammatories is not a huge deal," Peavy said. "Hopefully it was one of those blips on the radar. That's what I was hoping. I have been treating the heck out of it and it's something that we're going to have to stay on top of because when you're coming off something, little things are going to pop up here and there."

Peavy will not make his next scheduled start Thursday against the Cubs, and manager Ozzie Guillen has said that Peavy will likely miss his first three or four starts of the season as he continues to recover while on the disabled list.

Romeo said that people should scale back expectations.

"If they're expecting him ... to be 100 percent like he was before mid-July last year, I think that'll be very challenging for him," Romeo said, according to the newspaper. "If they're expecting him to be able to give possibly 60 pitches, maybe a little bit more, then I think that would be a reasonable estimate. It remains to be seen whether he's going to be able to get his pitch count up into the 80s and be able to tolerate that and stay in his normal rotation. ... When he went up to 80 pitches, his shoulder said, 'We need to go a little bit slower to get up to this level.'"

Doug Padilla covers the White Sox for ESPNChicago.com.