The NRL's salary cap for next season could still end up rising from $9.2 million, with Rugby League Players Association chief Ian Prendergast declaring it was "jumping the gun" to think that figure was set in stone.

Edgy clubs, particularly those facing having to offload players, are keenly awaiting the finalisation of the cap for 2018 and Parramatta captain Tim Mannah said on Monday he could see the impact the uncertainty was having on Canterbury, one of the teams under cap pressure.

Parramatta captain Tim Mannah says he feels for players at clubs under salary cap stress. Credit:Brendan Esposito

With 75 per cent of clubs having to tick off on the terms of a new collective bargaining agreement there has been much discussion behind the scenes about where they stand on an indicative $9.2 million cap for next season, with those under cap stress pushing for that figure to be increased. It is understood those clubs don't have the support for a significantly higher cap and Newcastle coach Nathan Brown made the position of the bottom-placed Knights clear at the weekend, calling on the NRL to ensure over-spending clubs, such as the Bulldogs and Raiders, are forced to shed players for next season.

The RLPA, however, issued a reminder on Monday that it had agreed to nothing when it came to the salary cap.