#1 Stiaan van Zyl
The Kolpak rule has taken many talented cricketers away from the South African side, and one of their brightest talents, who could have been the one for the future, was Stiaan van Zyl.
Before joining Sussex in 2017, he played 12 Tests for the Proteas, but was noted for his unbeaten century on debut for them against the West Indies at Centurion in 2014. He made bucketloads of runs in domestic cricket, and showed promise in his first game, but could not get a single 50+ score in his next 11 Tests.
He played the last of his 12 Tests in 2016, before realising that he would rather make his career in English county.
Yet, if he had continued in the same vein as his debut Test, South Africa could have been helped in closing the wound left by the departure of Jacques Kallis and Graeme Smith.
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