Matt Cook has signed a contract extension with Castleford which will keep him at the Tigers until the end of the 2019 season.
The 31-year-old signed a two-year extension with an option of third in 2016 and he has now taken up the additional year.
Cook played a key role in Castleford picking up the League Leaders Shield last year and is delighted to have extended his stay at the Mend-A-Hose Jungle.
He said: “We’ve had a tough pre-season and a tough start to the year.
“I was in the last year of my contract and needed a big start and a big year. It’s nice that they have pulled me in early and offered me an extension.
“Getting the contract situation out of the way early gives me a chance to really focus on my rugby and get on with the job in hand.”
Daryl Powell, Tigers head coach, added: “Matt Cook has been a consistent player during his time at the Tigers and has this season shown an ability to improve again.
“His energy coming off the bench for us has been fantastic and I am confident he will continue to get better.
“He is also a quality bloke who adds as much off the field as he does on it.
“I am really happy he has committed to the club and look forward to working with him on a continued basis.”