But they have 27 days to finalise any changes before playmakers Aidan Sezer and Sam Williams are due to report back for pre-season training on December 4.

Williams has agreed to terms on a two-year extension and the Green Machine expects Sezer to sign with English Super League club Huddersfield in the coming weeks.

The Raiders have England international George Williams joining their halves stocks ahead of next season.

Raiders recruitment boss Peter Mulholland said Williams' retention wasn't dependent on Sezer finding a new home and they would be able to carry all three halfbacks if they had to.

He said Jack Wighton's Clive Churchill Medal-winning form had the five-eighth role locked up for next year, which meant the other three would be fighting for the No.7 jersey.

"One position is signed sealed and delivered, and that would be the five-eighth," Mulholland said.

"And the other three would be fighting for one."

Mulholland said it was a straight two-year deal for Williams, without any options attached.

Williams has played 94 NRL games, all-but four for the Green Machine.

The 28-year-old has just married and wants to stay in Canberra - and wants to stay with the Raiders.

Mulholland said he was a valuable member of the squad.

Williams was part of the halves depth both in 2016 when the Raiders made the preliminary final and this year when they made the decider.

"Sammy Williams has re-signed, he's agreed to terms," Mulholland said.

"He's an NRL player that's played [90-100] NRL games and he's a depth player for us.

"He's an important part of it and he's been a really good fill-in when he's been there."

Sezer has been linked with a three-year deal with Huddersfield, who are coached by ex-Raider Simon Woolford.

But he's yet to ask for a release from his Raiders deal for 2020.

His expected move to England could be finalised in the next fortnight.

Sezer's manager hasn't returned The Canberra Times' calls.

While Latrell Mitchell has been linked with a raft of NRL clubs after the Sydney Roosters pulled his contract offer for 2021-22, it's believed the Raiders aren't interested in the Australian centre.

He's contracted to the Roosters for 2020, but his future remains clouded beyond that.