Rossouw made history as the first South African batsman to score a 100 in the ICC Men's T20 World Cup which he did against the Bangladesh national cricket team.

Rossouw made his first-class debut in November 2007 for Free State against Easterns, batting at number three he topscored in the match with 83, an innings that included 13 fours.

The innings was the fastest triple century in South African domestic cricket and included 47 fours and 8 sixes.

He represented Multan Sultans for 4 years till PSL8 and now has been traded to Quetta Gladiators again, for ninth edition of Pakistan Super League.

[12][13] However, Rossouw was one of five South African cricketers to miss the tournament, after failing to confirm travel arrangements in due time.

[18] While attending Grey College in Bloemfontein Rossouw was selected to represent a South African schools team.

At the World Cup he played all six matches scoring 136 runs at an average of 34.00 as South Africa reached the final.

On 5 January 2017, Rossouw signed a Kolpak deal with Hampshire County Cricket Club which made him ineligible to represent South Africa anymore, ending his international career.