McCann, who cracked 20 homers and supplied 67 RBI over 121 games this past season, was hindered by a series of shoulder problems that contributed to a career-low .230 batting average.
The Braves said team orthopedic surgeon Dr. Xavier Duralde carried out a procedure targeting the posterior portion of the six-time all-star's shoulder.
But whether McCann would be ready to go by spring training remained uncertain.
The Braves hold a $12 million option for 2013 on the catcher, which they must exercise within three days of the end of the World Series if they intend to keep him.
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