He was injured whilst playing for Reading after a tackle by Richard Carpenter, who was then playing for Cardiff
"The tackle and the injuries I sustained changed the course of my life and, inevitably, there have been difficult times for my family and me.
"I would like to thank those who have been by my side and supported me, particularly my wife Karen, my parents and my close family."
Casper now coaches Bury's youth and reserve teams but claimed damages against Carpenter and Cardiff. The case was due to be heard at Manchester High Court later this month.
The case has now been settled out of court, but if the case had been fought, Casper would have called United boss Sir Alex Ferguson and England full back Gary Neville to give evidence on his ability as a player and his professionalism. Casper's dad Frank, who was a star at Burnley during the 1970s, also had his playing career cut short by injury.
Casper continues:
"I would also like to extend my gratitude to my fellow football colleagues, particularly Sir Alex Ferguson, Gary Neville, Tommy Burns and Manchester United. Thanks also to my legal team led by Jan Levinson at Beachcroft Wansbroughs, the barristers Adrian Brunner QC and Richard Hartley, the experts, particularly Frank Clark and Mel Stein and indeed everyone who helped on the case, for all their work to achieve this result.
"I enjoyed more than 10 years of professional football. The game has always played a major part in my life and it was a shock to suffer an injury of this nature. I'm now coaching with Bury FC and enjoying the second chance that football has given me."