Hull Kingston Rovers centre Darrell Goulding has been forced to retire at 27 years of age.
Goulding has been advised to hang up his boots after suffering a series of concussion injuries.
The Englishman has made over 150 top-flight appearances during his career with the likes of Wigan Warriors, Salford Red Devils and Hull KR.
"I've had a lot of head injuries and concussions over the years and it's probably a case of picking up one too many," he told Hull's official website.
"I'm gutted because I never expected to retire at 27 and I've been really enjoying my time with Rovers, so it's come as a massive shock.
"I've spoken to a lot of medical people and specialists and they're concerned about the long-term damage I could do by playing on. I've got to think about my health after rugby and while every player just wants to get back out on the field, the time comes where you've got to listen to what these people are telling you."
Hull KR continue their Super League campaign on June 5 when they will host Castleford Tigers.
