Former Great Britain international Paul Newlove has retired at the age of 32 due to a persistant foot injury.
Newlove enjoyed his best days at St Helens
The former Featherstone, Bradford and St Helens centre, the most expensive player in rugby league history, has played just five times for Castleford.
Tigers chief executive Richard Wright said: ""Paul has done his best.
"He's been playing through the pain barrier but it's proved impossible to remedy the situation. We thank Paul for his efforts and wish him well."
Newlove bows out with the remarkable tally of 476 appearances for his four
clubs and with 347 tries in his 16-year career.
He still holds the record for being the youngest Great Britain debutant at 18 years and 72 days, and won 20 Test caps from 1989-98.
After beginning his career with Featherstone in 1988, Newlove joined Bradford
for a £245,000 fee five years later and in 1995 moved to St Helens in a world
record move valued at £500,000.
Bradford received £250,000 and three players - Bernard Dwyer, Paul Loughlin and Sonny Nickle - in exchange for the powerful centre.
Newlove then went on to win every honour in the game during St Helens' early
dominance of Super League, appearing in their Challenge Cup final successes of
1996, 1997 and 2001 and their World Club Challenge triumph of 2001.