Reynolds' first season at the Broncos has been hampered by short-term injuries. He has spent time on the sidelines with leg and groin complaints and missed the side's loss to Melbourne in round 15 after suffering a rib injury the week before.

But the premiership-winning halfback got through training unscathed on Monday and is on track to face the in-form Cowboys.

"He trained well out there today," Brisbane prop Corey Jensen said.

"He's feeling good. There's still two more sessions to go this week but I think he's going to be there."

Reynolds looms as a crucial inclusion for the Broncos who will need to be at their best in Townsville.

With a win, Brisbane could move back into the top four.

"We need (Reynolds) there," Jensen said.

"He's our leader and I'm sure he'll want to be out there."

The Broncos could be without Payne Haas, who suffered a suspected ankle injury in the second State of Origin game on Sunday in Perth and was seen in a moon boot afterwards.

But Jensen said Haas' absence wouldn't faze them if he was ruled out.

"We've shown this year that we've worked well as a pack in the middle," Jensen said.

"Starters and those off the bench have done really well. If he is out, then I'm sure the next person will come in and step up."

A former Cowboy, Jensen said it was important for him that Brisbane make a statement in north Queensland, especially after conceding a hefty defeat in the sides' last meeting in round three.

"You always want to get one over your old side," he said.

"My first time going up north and playing up there, there's definitely going to be a bit of extra feeling and motivation but the whole side is motivated.

"They did a number on us down here on our home turf so we want to give it back to them on the weekend."

Australian Associated Press