Career
He regularly played as a winger or a fullback. He played for the Leopards, Griquas and Pumas in domestic South African rugby during his playing career which spanned 2002 to 2012. He wrapped up his playing career at the Pumas, retiring after the 2012 season.
The Pumas appointed him as a coach and assistant to head coach Jimmy Stonehouse.
When Stonehouse left to join Japanese Top League side Toshiba Brave Lupus at the start of 2015, Mentz was named as his successor. On 2 November 2015, the Pumas announced that Mentz was reappointed as head coach until the end of 2017.
