Casali revealed Saturday that he underwent hamate surgery in December, John Shea of the San Francisco Chronicle reports.

Casali signed a major-league contract with the Giants in January, but the catcher revealed Saturday that he had surgery during the offseason. However, the 32-year-old has been playing catch and hitting without pain to begin spring training. While he could face some limitations during camp, Casali was optimistic that he'll be ready for Opening Day.

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