More on Greene here - http://m.mlb.com/news/article/227892448/is-hunter-greene-the-best-high-school-rhp-ever/ Callis discusses if Greene is the best HS pitcher ever. Some think Beckett is still the best HS arm but they did compare Greene to some recent HS arms - "Compared to prep right-handers from this decade, Greene has much better command than Riley Pint (No. 4 overall, 2016, Rockies), much more athleticism than Tyler Kolek (No. 2, 2014, Marlins) and Lucas Giolito (No. 16, 2012, Nationals) and a better delivery than Pint or Dylan Bundy (No. 4, 2011, Orioles). Some scouts will counter that Pint threw just as hard and had much better secondary pitches, and that Bundy was the most polished high school arm they've ever seen."