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"BOSTON, MA -- Wily Mo Pena underwent diagnostic testing and further examination on Tuesday. He has an injury to the hamate bone in his left wrist. The plan is to perform a surgical procedure on Thursday morning to treat the injury.

Wily Mo will immediately begin rehabilitation on the wrist. He will be able to continue his throwing and conditioning programs throughout the entire post-operative period.

NOTE: Pena was placed on the 15-day disabled list on May 28 (retroactive to May 27). He is batting .321 with four homers and 18 RBI in 36 games with Boston in 2006.''

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According to the website athleticadvisor.com, hamate injuries take six to eight weeks to heal. Other reports indicate it can take up to a year for a player to regain all of his power after surgery.