NSW winger Brett Morris is likely to be available for State of Origin II despite suffering a hamstring injury in St George Illawarra's club-record ninth straight win, a 24-18 victory over Wests Tigers on Sunday.

Morris left the field immediately after scoring a 39th minute try, finishing a 90m effort started by captain Ben Hornby that took the Dragons out to a 20-6 lead.

The Blues winger, one of seven Dragons who backed up from Origin I last Wednesday night, had made a strong comeback from his Suncorp Stadium nightmare where an error cleaning up a kick allowed Queensland winger Jharal Yow Yeh to score a crucial try.

Morris had also played a leading role in Matt Cooper's sixth minute try at WIN Jubilee Oval, beating two players and laying on a deft pass, while he was also disallowed a try in the 34th minute.

Dragons coach Wayne Bennett said early signs were the winger had not torn the muscle.