Johannes Petrus Jacobus 'Hansie' Graaff (born 10 September 1989 in Pretoria) is a South African rugby union player for Bayonne in the Top 14 in France. He is a utility back that can play as a fly-half, centre, winger or full-back.He is also known as the bulldog because of his aggressive style of play, he once tackled everyone on the pitch even the referee.