At the 1988 Pan Pacific School Games in Sydney, Feifar won three gold and one bronze medals. In 1990, he set a world record and four Australian records at the Australian Amputee Games. At the 1990 World Championships and Games for the Disabled in
Assen Netherlands, he won five gold and two silver medals and broke two world records (long jump and pentathlon). After these Championships, he accepted a scholarship in the newly established
Australian Institute of Sport Athletes with a Disabilities program and was coached by
Chris Nunn. In 1993, he retired from competition. His coach Chris Nunn was quoted as saying: "Karl was extremely talented but due to early retirement he didn't realise his full potential". ==Death==