St George Illawarra captain Ben Hunt has sustained a broken leg during his side's 38-12 win over Manly on Friday.

The Dragons confirmed on Saturday that Hunt has suffered an impact fracture in his fibula, with a rehabilitation timeframe currently unknown until further consultation.

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Hunt played 71 minutes in the Round 3 win at Kogarah, managing 294 kick metres, one try assist and two offloads for the match.

The 31-year-old has had a stellar season so far since taking on the captain's armband, scoring one try and handing off a further five from his three matches.