Headgear Harry: Grant trains in Maroons' decider boost

But on Thursday, donning headgear to protect a secondary Origin wound, Grant was all smiles as he completed a session that included a full-contact hit-out against Queensland Cup outfit Wynnum-Manly.

Grant's one-two punch with Ben Hunt, traditionally starting on the bench behind the versatile St George Illawarra star, has proved effective in his 10 Origin appearances.

Centre Hamiso Tabuai-Fidow (shoulder), who also hasn't played at club level since the Maroons' game-two loss in Melbourne, also took his place in the session.

The hosts must rebound from a one-sided 38-18 loss in Melbourne with coach Billy Slater recalling fit-again Kalyn Ponga as a utility, veteran Dane Gagai in the centres and Selwyn Cobbo to partner Valentine Holmes on the wing.