Mets pitcher R.A. Dickey successfully underwent surgery Thursday morning to repair a core muscle injury that he pitched with for most of his breakout season. The knuckleballer is expected to be ready for spring training.

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Dr. William Meyers performed the procedure at Jefferson Surgery Center in Philadelphia. Dickey, 37, became just the sixth Mets pitcher to win 20 games while making himself a leading candidate for the Cy Young Award.

He also led the National League in strikeouts (230), innings (232 2/3), complete games (five) and shutouts (three) -- all while pitching through the abdominal injury suffered early in the season.