North Queensland coach Paul Green has advised caution about a return date for Johnathon Thurston.

Thurstons shoulder injury, received in the final minutes of Friday nights ANZAC Test sees the Queensland five eighth battling to be fit for Origin Game One  on May 31.

Thurstons Cowboys coach Green (pictured) has called for an end to speculation on when the skipper will be back from the injury , saying it will be weeks at least until a return can be considered.