Fullerton made his first-class debut for Transvaal in 1958–59 as an opening or number-three batsman, and played five matches over the next three seasons with moderate success.
He toured England in 1961 with the South African Fezela XI of promising young players, scoring his first century, 103, in the innings victory over Combined Services.
[1] He opened the batting for a South African Colts XI against the touring New Zealanders in 1961–62, top-scoring with 35 in the second innings.
[3] He made his highest score, 145, in the innings victory over Western Province, adding 207 for the second wicket with Peter Carlstein.
[5] In 1964–65 he played in a trial match before the series against the touring English team, but made a pair.