In an interview Hardwick was asked about tuck and responded something about having things to work on, which he is, as do many others.
So if tuck has been told what he needs to work on and he does this to a level that Hardwick wants, Im sure he'll play him.
In fact I wouldn't be surprised if Hardwick is just itching for Tuck to address whatever he has been asked to, because as a mature bodied hard nosed player he will bring exactly what Hardwick wants to the side now, if he can play as hardwick instructs.
Personally I'd have Tuck in the side before Jackson as I'd back him to deliver the ball better than Jacko.
Talk that he shouldn't get a game because he wont be part of our next premiership is crazy. For a start know one knows when that will be, but as players such as cousins and Simmonds definitely wont be either and Hardwick still plays them so I'd guess that that is not really a consideration. (In fact going on the clubs history over the last 28 years you could easily argue that not one single player on the list will play in the clubs next premiership and a lot of us wont be around to see it.

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There's probably a number of players in the side at the moment who do the defensive work or whatever as Hardwick asks and they are being given enough time to show whether they have what it takes to play at this level. If players such as King, Nahas, Hislop, Thompson, Edwards play the first half dozen or more games and then are dropped, my guess would be that they will have a line drawn through their names.
As a new coach everyone should start with a clean slate and to draw a line through players names without even giving them a chance would be bereft of the coaching staff.