The Newcastle Knights have signed Roosters, Queensland and Australian forward Aidan Guerra until 2020.
The last-placed NRL club made the official announcement on Thursday afternoon with Guerra, 29, agreeing to a three-year deal starting next season.
It comes three days after Guerra was dropped from the Maroons squad ahead of State of Origin II in Sydney next week.
"Aidan is a player with a lot of experience, which is important for us," Newcastle coach Nathan Brown told Knights media.
"He's been in grand finals, won grand finals and won Origin series.
"We have a lot of young players that haven't played a lot of NRL, and like [previous signings] Jamie Buhrer and Rory Kostjasyn, Adrian comes from a good club that is used to winning."
Brown said Guerra would take on a senior role in a younger Knights squad.
"We feel that Aidan leaving the Roosters and coming to a team with a lot of younger players will allow his leadership to grow," Brown said.
"He'll fit in well, and he's at a stage in life where he has a young child. Newcastle is a really good place to bring up a family, so off the field we think he'll fit in well."
Coming off two straight wooden spoons Brown said bolstering the player ranks remained high on the Knights’ agenda.
"We know that we're certainly in the situation where we need to recruit more players," Brown said.
"We're very confident that we'll come up with some more signings over the next month.
"How many I don't yet know, but they'll certainly help our squad get a lot better."
Knights chief executive Matt Gidley echoed those sentiments.
“Aidan will be a great addition to our young side,” Gidley told Knights media this week.
“Aidan is a representative and premiership-winning player who will bring athleticism, experience and leadership to our team from a very successful career to date.
“The club will continue to monitor the player market and recruit players who can complement the emerging players in our roster.”