The likes of Wayne Bennett - who suggested the league was lagging behind other sports in not implementing one - and Ivan Cleary have also endorsed the move that proposes up to three trade windows during the season.

NRL chief executive Todd Greenberg said following the conference that the trade windows would bring transparency to player transfers and restore the faith of fans tired of seeing players commit to other clubs more than a season in advance of their current deals.

The Rugby League Players Association is yet to be convinced of the merit in the idea that proposes windows at the beginning and end of each season and somewhere around the Origin period.

Current rules impose a June 30 deadline for all player transfers, with the Dragons this year signing Patrick Kaufusi as mid-season replacement for stood down star Jack de Belin.

The club was given a little over $200,000 in salary cap relief in order to replace de Belin for this season, a small fraction of his reported $700,000 salary.

With the bulk of the club's roster already contracted for next season and beyond, the Dragons have little room to move in their cap with the de Belin saga set to drag indefinitely into next season.

Trade windows would give a club more flexibility should similar circumstances arise out of disciplinary matters that see the NRL impose it's no-fault stand-down policy.

McGregor admitted he hadn't looked at the finer details of the proposal but said the idea had plenty of merit.

"I haven't looked into it too much but I've read a bit about it and I don't mind it, I think it's good," McGregor said.

"It's definitely something we should look deeper into and open a couple of windows throughout the year.

"You make change at the right time and everyone can be aware of what's happening and what's available instead of sneaking around and doing it like most people do.

"You won't stop everything but that'll help with being nice and open. I think it's a step in the right direction for sure."

It was a brief consideration for McGregor on Friday, with making it back to back wins for the first time since round six against Cronulla on Sunday his top priority.

"Form goes out the window when these two sides clash and it's important we become the finals spoilers for the last month of footy," McGregor said.

"We'll start with the Sharks, they need to win three of their next four so it's an important game for them. We'll go up there with a bit of an attitude to spoil the party."

The club was dealt another injury blow this week, in a year that's had many, with Tariq Sims succumbing to a long-term groin complaint that will see him miss the remainder of the season.

"Taz has been carrying that injury since back in March," McGregor said.

"The performance staff have done really well to manage it over such a long period with injections and rest but Tariq needed to get [surgery] now so he gets full preseason in.

"It's about a 12 to 16-week recovery. Getting it done now he gets a month rest, he'll [then] get eight weeks off at the end of the year like everyone so it'll be a 12-week rest before he gets back into training."