The big wet which has drenched the entire eastern seaboard has earned NSW skipper Danny Buderus a stay of execution, with a decision on his availability for Wednesday night's State of Origin decider to be made on Friday.

Buderus was expected to have a fitness test on his injured toe at NSW training on Thursday, but the session was cancelled due to the inclement weather.

The only things the Blues were able to complete were a weights session in the morning and a store appearance in Sydney to sign a few autographs.

The Newcastle hooker will now have a run on Friday to prove he is over his injury woe, which had forced him to wear a protective boot ever since re-injuring the toe during NSW's series levelling victory on June 15.

He removed the boot on Tuesday, but has so far not been able to take to the training paddock.

Penrith rake Luke Priddis will remain with the squad, but team officials remain hopeful that Buderus will play.

NSW coach Ricky Stuart is desperate for Buderus to play, acknowledging that his combination with halfback Andrew Johns is vital to the Blues' hopes of victory in Brisbane.

The big wet also threatens to nullify NSW's ability to unleash its explosive backline at Suncorp Stadium next week.

NSW centre Mark Gasnier, who has been a standout over the opening two games despite limited opportunities, said the Blues had to win the battle up the middle before looking to expand their game.

"It depends so much in Origin football on weight of possession," Gasnier told Sydney radio station 2KY.

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