“I thought he was a dude.  Who knew?”BIRMINGHAM, Ala.–Yesterday, Dr. James Andrews performed arthroscopic surgery on Cubs right-handed Mark Prior. Andrews did a debridement of Prior’s right rotator cuff, as well as repair the labral and capsular injuries in his right shoulder.

Andrews had expected such a result going into the surgery. What he did not expect, however, was the high level of estrogen in Prior’s shoulder.

“The amount of estrogen in the blood from the patient’s shoulder that we tested was such that we believe that the patient is, in fact, female,” Andrews said. “Of course, this raises an incredible number of questions about the birth of the patient’s daughter, the patient’s career as a professional baseball player, and the patient’s sideburns.”

On the other hand, the discovery did answer several questions about Prior. “Well, of course, this also explains the patient’s incessant nagging, inability to drive, and constant complaints about the temperature in the clubhouse being too cold,” Andrews said.

Cubs general manager Jim Hendry had no comment regarding the contractual implications of Andrews’ discovery.