ST. PETERSBURG, Fla. -- White Sox pitcher Jake Peavy ran into another speed bump in his attempted recovery from surgery on Monday night. Pitching for AA Birmingham, Peavy left his start after 15 pitches to six Mississippi Braves batters with "discomfort," according to the Sox.

The Sox did not say where the discomfort was for the Sox' $16 million right-hander, who went on the disabled list with rotator cuff tendinitis before the season. But the word around the clubhouse after the game was that the discomfort was in the lat area which he had surgically repaired in July.

After giving up four hits to the six batters he faced, Peavy was unavailable to the media on Monday night. He will be re-evaluated Tuesday afternoon and will undoubtedly not return to the mound for the Sox in late April as hoped.

"Another [round of] bad news for the White Sox.,'' Sox manager Ozzie Guillen said after the Sox' 5-0 loss to the Tampa Bay Rays. "It's something I worry about because he's my player, that's a setback for him. Hopefully [today] we have better news.

"In my mind, I know it's going to happen. If it happens in July, you say wow. Of course, we want him here but we have to wait and be patient with him.''

Opening an 11-game road trip with a flat four-hit effort against David Price (2-2), the Sox (7-9) lost for the sixth time in seven games.