The 24-year-old, who has already battled back from three knee reconstructions, was injured at training last week.
The Dockers expect him to train with the club’s rehab group for six weeks.
Morabito has been limited to just 26 games since being selected with pick four in the 2009 National Draft. It was a blow for the Dockers who are preparing to face the Adelaide Crows in a pre-season match at Sounness Park in Mt Barker on February 28.
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