Former Proteas wicket-keeper and Highveld Lions captain, Thami Tsolikile, his provincial team mates Pumelela Matshikwe and Jean Symes as well as the Titans' Ethy Mbhalati were banned for contriving or attempting to fix matches in the 2015 Ram Slam T20 Challenge Series.
Tsolekile was banned for 12 years, Mbhalati and Matshikwe for 10 years and Smyth for seven years.
The banning of these four players follows lengthy investigations and the previous imposition by CSA in January 2016 of a 20-year ban on former Proteas, Lions and Titans player Gulam Bodi.
Bodi had admitted to charges of contriving or attempting to fix matches in the series and acted as an intermediary for international betting syndicates, approaching certain players with a view to engaging in fixing activities during the competition.