He also played for Hunslet Hawks, Doncaster RLFC, Featherstone Rovers, Wakefield Trinity Wildcats and York City Knights.
He came second in the ranks for top try-scorer for Hull Kingston Rovers in 2006, and was Man-of-the-Match in the Robins' memorable game that saw them be promoted to Super League.
However, in 2013 Wakefield Trinity were forced to sell players to pay off debts and Cockayne moved back to Hull Kingston Rovers at the end of 2013.
[12] In 2009 Cockayne was found guilty of actual bodily harm after CCTV footage showed him punching and kicking a man in the head.
A Hull Kingston Rovers spokesman said: "The club will be carrying out a full internal investigation into comments allegedly made on a website by Ben Cockayne.
The Rugby Football League, which has a Kick Racism into Touch campaign, said: "We will be speaking to Hull Kingston Rovers about a potential social media matter.