TOWERING Gold Coast forward Peter Wright has added to the club's casualty list, suffering a medial ligament knee injury that will rule him out for the rest of the season. 

Wright suffered the injury early in Sunday's loss to Melbourne after landing awkwardly in a marking contest.

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Suns rehabilitation manager Alex Rigby told the club's website Wright would start his rehabilitation program and be ready for day one of pre-season.

Wright joins former captain Tom Lynch (knee), midfielder Aaron Hall (pectoral) and tall forward Sam Day (shoulder) on the sidelines for the rest of the year. 

Jack Martin (calf) also has a big question mark over whether he'll return or not.

In further Suns injury news, hard-nut midfielder David Swallow is expected to be available to play Richmond on Saturday after missing last week's match with concussion.

"He trained strongly earlier this week and will train with the group on Wednesday with a view to be available over the weekend," Rigby said.

Brayden Crossley has also recovered from his broken cheekbone and Rory Thompson from a hamstring niggle and both are expected to play the Tigers.