Two unimpeachable sources now advise that Red Sox first baseman Kevin Youkilis, who appeared to jam his thumb while batting the other night, has in fact so severely torn a muscle – possibly a torn ligament – that whether or not he will actually require surgery on the injured hand, he is not expected to play again this season.

Youkilis is, as revealed earlier, headed for a further examination tomorrow by Dr. Thomas Graham, hand specialist at the Cleveland Clinic.

Further details as they become available.