LATEST PG SHOWCASE REPORT
2014 California Underclass Showcase
William Mathiesen is a 2016 RHP with a 5-11 135 lb. frame from Rancho Palos Verdes, CA who attends Palos Verdes Peninsula HS. Medium frame, slender build with plenty of room to fill. Pitches from a high three quarters arm slot. Arm side run on fastball with occasional sink when down in the zone. Showed ability to keep ball down and induce ground ball contact. Good feel for curveball with deep 11-5 break, threw changeups for strikes to left handed hitters, maintains arm speed well on secondary pitches adding to deception and effectiveness. Good student.