The rugby league transfer merry-go-round occurs every year, new players come, while others go. It's part of the game and it happens to every team.
However, particular departures can leave fans wondering what could have been. We've looked at each team and picked one player they would love to have back in their jersey.
TOWNSVILLE, AUSTRALIA - APRIL 08: Johnathan Thurston of the Cowboys passes the ball to a team mate during the round six NRL match between the North Queensland Cowboys and the Wests Tigers at 1300SMILES Stadium on April 8, 2017 in Townsville, Australia. (Photo by Brendon Thorne/Getty Images)
Johnathan Thurston
The decision the release Thurston in 2004, will be listed down as one of the biggest retention blunders the game has seen.
Thurston desperately wanted to stay, shedding tears in the Belmore carpark when told he was going to leave.
In 2017, Thurston is the greatest rugby league player in the game. The Bulldogs attempted to lure him back to Belmore in 2013, however, he stayed in Townsville.
If Johnathan Thurston had left the Cowboys, North Queensland and the game of rugby league would've been robbed of so many great memories and moments.
The Bulldogs club can only sit here and wonder 'what if'.