Jack competed at the 1996 Summer Olympics held in Atlanta, he entered the 200 metres and ran a time of 21.94 seconds and finished 6th in his heat so didn't qualify for the next round. A year later he competed at the 1997 World Championships in Athletics held in Athens, he entered the 100 metres, in the first round he finished 91st out of 103 runners so didn't qualify for the next round.