On this week's episode of GOLF's Subpar, PGA Tour instructor Mark Blackburn joins former PGA Tour pro Colt Knost and his close friend and on course rival Drew Stoltz for an exclusive, in-studio interview. The 2020 PGA Teacher and Coach of the Year talks how working with Tour pros like Charley Hoffman, Kevin Chappell, and Chez Reavie differs from working with the everyday golfer, his stance on the distance debate, and what the average player can pick up from studying the swings of the best players in the world.