FORT MYERS, Fla. -- Red Sox pitcher Chris Carpenter -- who came to Boston from the Chicago Cubs as compensation for the Cubs hiring Theo Epstein as president of baseball operations -- will have surgery Thursday to remove a bone spur from his throwing elbow.
Red Sox general manager Ben Cherington confirmed the surgery, which Carpenter had tweeted Wednesday.
The procedure will be performed in Birmingham, Ala., by noted orthopedic surgeon Dr. James Andrews.
Carpenter had passed both his Cubs and Red Sox physicals after he was traded, a source told the Boston Globe. Boston, therefore, likely will not receive another player because the deal was transparent.
According to the Globe, the Red Sox were aware that Carpenter had past elbow problems but believed he was over them.
"We just found out about that," Cubs general manager Jed Hoyer said Thursday of the Carpenter injury.
"It's something you never want to happen in any trade. You want both sides to feel good. That's not a great thing to have happen both for Chris and the Red Sox. It's something we just heard about and we're looking into it, but I wouldn't read anything into that."
Asked if Carpenter's injury means the compensation deal might be restructured, Hoyer gave a succinct, "No."
Carpenter, 26, has thrown just two innings this spring.
To complete the compensation saga, the Cubs received 19-year-old first baseman Jair Bogaerts from the Red Sox Thursday.
The teams had settled on a scenario where the Cubs would not only give up a mid-level prospect but that the clubs would also exchange players to be named later.
The prospect was Carpenter, and the Cubs then sent their player to be named later, right-handed pitcher Aaron Kurcz. On Thursday, Bogaerts was sent to the Cubs.
Information from ESPNChicago.com's Doug Padilla was used in this report.