SEATTLE -- White Sox right-hander Jake Peavy has a non-displaced rib fracture on his left side, an MRI Wednesday morning revealed Wednesday morning.
Peavy will be shut down for 4-6 weeks. The only treatment for such an ailment is rest, and he will be evaluated throughout the healing process.
Peavy said the injury surfaced on Sunday while the team was in Oakland. He wouldn't back down from a start against the Mariners Tuesday, he said, with fellow Cy Young winner Felix Hernandez pitching for the Mariners and the Sox going through a seven-game losing streak.
Peavy left the game during the third inning. The Sox eventually lost 7-4, extending the streak to eight. X-rays taken Tuesday night did not reveal a fracture.
Peavy was sore enough to see a doctor Monday.
"He felt he could go through it,'' manager Robin Ventura said Wednesday before getting the results of the MRI. "I can't sit there and figure out the guy unless he gives you the information. He felt he could get through it. It's one of those where he started out and looked all right. By the time he got to the third, it looked like there was something going on.''