With literally millions of dollar of players off-contract at the end of 2018, clubs will be looking to lock their star players (or future star players) into long-term contracts. It's inevitable that players will move clubs however there are some players that just cannot be replaced.
Below is a look at the one player your club must re-sign. This doesn't have to reflect the biggest name off contract but more-so the player I believe each club should pull out all the stops to ensure they do not move clubs.
NEWCASTLE, AUSTRALIA - MARCH 19: Sione Mata'Utia of the Knights reacts after the game finished in a draw during the round three NRL match between the Newcastle Knights and the Canberra Raiders at Hunter Stadium on March 19, 2016 in Newcastle, Australia. (Photo by Tony Feder/Getty Images)
Sione Mata'utia
It's incredible to think the Newcastle captain is still only 21 years of age. He has played for the Kangaroos as a winger, developed into a Knights starting second rower and now looks set to play centres in 2018.
He can literally do it all. Given the time the Knights have invested, I would be very surprised to see him line up elsewhere for 2019 and beyond, but the Knights need to ensure they don't lose a player they can continue to build around moving forward.