Kai has cerebral palsy and when he was 7 years old, he had surgery which was meant to increase his mobility but did not work and was told he would not play sport.
Mae parlys yr ymennydd ar Kai a chafodd lawdriniaeth pan oedd yn 7 oed, a oedd i fod i wella ei allu i symud, ond ni fu’r driniaeth yn llwyddiannus.