Buthelezi made his
Super Rugby debut for the in February 2019, coming on as a replacement in their 45–10 victory over the in
Singapore. Buthelezi was named as captain for the
2021 Currie Cup Premier Division. During the
2025–26 United Rugby Championship, Buthelezi made his 100th appearance for the Sharks in international competitions. In December 2025, Buthelezi signed an extension to keep him with the Sharks through 2029. == International ==