Hull FC captain Craig Fitzgibbon is to retire from the game after his season was ended by a serious ankle injury.
Fitzgibbon, 34, suffered a fracture and ligament damage in Saturday's 50-18 win over Castleford.
"Craig is a giant in the game and will leave a legacy of professionalism that we will continue to benefit from in the coming years," chief executive James Rule said.
"He has made an enormous impact on our club both on and off the field."
Rule added: "On behalf of the directors, staff, coaches, players and fans, I would like to thank Craig for his contribution to Hull and wish him and his family all the best in his future endeavours."
The former Australian test and State of Origin forward has made 44 appearances for the Black and Whites since joining them in 2010 and took over the captaincy from Sean Long at the start of this season.
Fitzgibbon became the highest scoring forward in the history of the NRL in August 2006.
He collected more than 1,500 points while playing for Illawarra Steelers, St George Dragons and the Sydney Roosters.