Castleford chief executive Steve Gill is recovering at his home from what the club call a vicious town-centre assault.
he Betfred Super League leaders say the emergency services were called to the scene following the attack in Bridge Street, Castleford, early on Friday.
A statement from the club said: "Castleford Tigers can confirm that CEO Steve Gill was the victim or a vicious assault on Bridge Street in Castleford earlier today.
"On behalf of everyone here at the club we wish Steve a quick recovery. We'd like to take this opportunity to thank the emergency services for their quick and professional response.
"Castleford Tigers now ask could all fans and the media respect Steve's privacy while he recovers at home with his family."
Gill's association with his home-town club began more than 50 years ago when he operated the scoreboard.
He held the role of assistant coach before becoming head of youth in 2008 and four years ago took over from Steve Ferres as chief executive and has overseen a remarkable rise in fortunes of the Tigers, who gained a 66-10 win over Leeds on Thursday night to maintain their unbeaten start to the season.