Terblanche played in 37 tests for South Africa, scoring 19 tries, including a South African test record of four tries (equalled with Chester Williams and Pieter Rossouw) on debut against Ireland at Bloemfontein on 13 June 1998, which he later bettered by scoring a then record five tries against Italy on 19 June 1999.
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On 1 November 2011 he signed a 3 month contract with Ulster rugby to provide cover for Jared Payne who ruptured his achilles in the PRO12 match against Treviso on 7 October.
Stefan Edberg | Stefan Sagmeister | Stefan Lazarević | Stefan Zweig | Stefan Raab | Stefan Heym | Ştefan Voitec | Stefan Dennis | Stefan Żeromski | Stefan Wyszyński | Stefan Nemanja | Stefan Karlsson | Stefan Brockhoff | Stefan Aust | Adam Stefan Sapieha | Stefan Weisman | Ştefan Vodă | Stefan Skarbek | Stefan Simonsson | Stefan Olsson | Stefan Lorant | Stefan Lochner | Stefan Heidemann | Stefan Guzy | Stefan Gryff | Stefan Grossman | Stefan Everts | Stefan Danailov | Tadeusz Stefan Zieliński | Sveti Stefan |