St George Illawarra forward Tyson Frizell has agreed to join Newcastle on a three-year deal starting in season 2021.
The NSW and Australian representative accepted terms with the Knights in January.
However, the NRL is not currently registering any new or updated contracts due to the uncertain circumstances around rugby league.
Dragons’ recruitment manager Ian Millward said Frizell had received one of the club’s most substantial offers in its history.
“It was a deal that reflected his contribution over the past eight years and, of course, the seasons that would have followed,” Millward said.
“We made responsible decisions when determining Tyson’s value and contract extension.
“Tyson’s decision to depart the Dragons at season’s end will now allow the club to pursue other quality players in the marketplace.”
The 28-year-old backrower started his NRL career at Cronulla in 2011 before agreeing to sign with the Dragons in April 2012.
Frizell released a statement on his Instagram following news of his latest decision.
“As an individual, family, community and as a game, there are more pressing priorities at the moment,” part of his statement read.
“So, with respect to the media and fans, I would like to make no further comments on my contract until [an] appropriate time. Stay safe everyone.”