Gerrit-Jan van Velze (born 21 February 1988) is a South African rugby union footballer. He plays for Bath Rugby in the Gallagher Premiership. He is a versatile forward and can play as a lock, flanker or number 8.
He previously played for the in Super Rugby, making his franchise debut during the 2010 Super 14 season against the . He also made 65 appearances for the in the Currie Cup and Vodacom Cup competitions.
He joined Worcester Warriors ahead of the 2014-15 English Premiership season.
He has signed for Bath Rugby ahead of the 2022-23 English Premiership season.
He retired from professional Rugby at Bath Rugby at the end of the 2023-24 English Premiership season.
He since been appointed as the Player Innovation and Performance Futures position at Bath Rugby