He has the Peter Kostis Learning Academy at Grayhawk Golf Club in Scottsdale , Arizona .
Among his many students are Paul Casey , Chez Reavie , Bernhard Langer , Steve Elkington , Dan Marino , Maury Povich , and Mike Schmidt .
Paul Casey has the Peter Kostis Learning Academy at Grayhawk Golf Club in Scottsdale , Arizona .
Among his many students are Paul Casey , Chez Reavie , Bernhard Langer , Steve Elkington , Dan Marino , Maury Povich , and Mike Schmidt .