St George Illawarra winger Brett Morris is the latest NSW player to be placed in doubt for the State of Origin opener on June 5 after undergoing knee surgery.

Morris injured his left knee during the first half of Monday’s defeat to Manly at Kogarah and had arthroscopic surgery on Wednesday to remove torn cartilage from the joint.

“We expect his rehabilitation time frame to be between two to four weeks dependent on how he recovers from surgery,” said Dragons high performance director Andrew Gray.

The news means Morris will definitely miss Sunday’s clash against the Gold Coast and Parramatta in round 10.

NSW coach Laurie Daley will name his side on Sunday, May 26 after Sunday’s round 11 matches and has already lost fullback Brett Stewart to a back injury.

There is also an injury cloud hanging over skipper Paul Gallen who sustained medial ligament damage to his knee last Sunday.

Gallen has been named to face the Wests Tigers on Friday but is rated as extremely doubtful to run out at Allianz Stadium.