He started his career at Transvaal in 1993, making his first-class debut against Northern Transvaal. In October 1993, Pothas made his debut in List A cricket against Barbados during Barbados' tour of South Africa. From his debut season to his international debut, Pothas represented Transvaal B and later as Transvaal were known, Gauteng. A regular in the first-class and List A arenas while in South Africa, he was a consistent wicket-keeper batsman, averaging on average in the mid thirties with the bat and keeping tidily behind the stumps.