Griffin has called time on an 18 year senior career at the age of 36, with his recent injury bringing an end to his playing days.
As previously confirmed by The Press, York Head Coach Mark Applegarth confirmed that Griffin had suffered a ruptured pec, which meant he would be sidelined for a minimum of four months.
He was forced off after half an hour against former club Wakefield Trinity, and required surgery to tackle the injury.
Griffin, writing on Instagram, has now confirmed his retirement, saying it was the ‘right time’.
The Knights man wrote: “That’s all she wrote.
“After 19 seasons, it’s time for me to retire from rugby league with immediate effect.
“It’s not the way I wanted it to finish, but due to my latest injury, I believe it’s the right time.
“However, one thing I’ve learned over my career is that I’m one resilient S.O.B.
“Growing up in Witney, Oxfordshire, I never imagined that making my debut as a 17-year-old in 2008 would begin such an incredible journey.
“The game has given me lifelong memories, friendships, experiences and opportunities that I’ll always treasure.
“I’d like to thank every club I’ve had the privilege to represent: Wakefield Trinity, Castleford Tigers, Huddersfield Giants, Batley Bulldogs, Salford Red Devils, Hull FC and York Knights.
“It’s been an honour to wear each every jersey and be part of so many special teams and communities.
“To my teammates, coaches, staff and supporters, thank you for being part of the journey and for the memories.
“Most importantly, thank you to my family. Your constant support, sacrifices and belief in me made it all possible.
“Through every high and low, you were always there, and I’m forever grateful.
“Rugby league has shaped so much of my life.
“As this chapter closes, I look ahead with pride, gratitude and excitement for what’s next.
“Thank you, rugby league. Griff out.”
Griffin joined Wakefield as a junior and made his professional debut in 2008 in a Betfred Challenge Cup victory over Salford.
He would join Huddersfield Giants at the end of the 2008 season, where he made his Betfred Super League debut.
A loan spell at Batley Bulldogs followed, before Griffin returned to Wakefield in 2011.
Spells at Wakefield, Castleford, Batley and Salford followed, with his stint at the latter seeing the second row play over 40 times.
But Griffin would spend the majority of his career at his next club, joining Hull FC in 2017.
In his first season with the club, he lifted the Challenge Cup trophy at Wembley Stadium, as FC defeated Wigan Warriors 18-14.
Griffin went on to make just shy of 150 appearances for Hull FC, scoring 45 tries in that time, before he returned to Wakefield for one final stint.
In his third spell at the Trinity, Griffin won both the AB Sundecks 1895 Cup final and the Championship League Leaders’ Shield in the 2024 season, which included victories over York.
He then joined the Knights in August 2025 and played nine times.
In total, Griffin made 235 Super League appearances, scoring 85 tries at the top level.