Erik van Rooyen is a South African professional golfer who plays on the PGA TOUR, European Tour and South African Tour. He has ascended rapidly through the Official World Golf Rankings and is now a Top 50 golfer in the world. Erik joins "On the Mark" to share his story, from growing up in golf in South Africa to contending with the world's best in Major Championships. He shares lessons learned, he talks swing technique, he opines on the value of team sports and multi-sport athletic development. Erik also shares insights on the value of perspective, being true to oneself, being comfortable in uncomfortable situations, and his approach of "polishing the diamond" for consistent improvement.