Siyabonga 'Scarra' Ntubeni (born 18 February 1991) is a South African rugby union footballer who plays as hooker for Western Province in the Currie Cup and the Stormers in Super Rugby.
Ntubeni debuted for both Western Province and the Stormers in 2011, however it wasn't until the 2012 Currie Cup that he really established himself as a first team member. He featured in all of Province's 12 games during that campaign and was instrumental as his side lifted the Currie Cup for the 33rd time. Ntubeni was a starter as Western Province triumphed 25-19 over the Natal Sharks in Durban.
2013 got off to a slow start as injury ruled him out of the first half of the Stormers season, but he did return for the final 8 games and this coincided with an upturn in his sides fortunes following a lacklustre first half of the season. He again made a big impact in the 2013 Currie Cup, taking advantage of Tiaan Liebenberg's injury and skipper Deon Fourie's switch to the flank to again be an ever present member of the side. He started 11 games and made 1 substitute appearance as Province reached the Currie Cup Final for the second year in succession, this time going down 33-19 to the Natal Sharks in Cape Town.