Collodd Mark ran isaf ei goes pan oedd yn ifanc ar ôl damwain wrth feicio adref o'r ysgol. Yn benderfynol o lwyddo, aeth ymlaen i fod yn athletwr elît, gan ennill medalau yn y pwll yng Ngemau Paralympaidd Seoul ym 1988 a Phencampwriaethau Miami World ym 1989.
Mark lost his lower leg at a young age after an accident whilst riding his bike home from school. His determination to succeed saw him go on to become an elite athlete, winning medals in the pool at the 1988 Seoul Paralympics and 1989 Miami World Championships.