The Pittsburgh Pirates have signed 18-year-old pitcher Shim Jun-seok (심준석), considered among the best prospects in baseball and the top Korean prospect, according to Jesse Sanchez of MLB.com.
Shim, South Korea's top prospect, throws a fastball that tops out at 100 mph and consistently sits in the 94-96 range. He features a true 12-6 curveball and shows good command of all of his pitches. What’s more, the big and strong-bodied Shim has been praised for his clean arm action and his athleticism.Chan-ho Park also pitched for Pittsburgh at the end of his career. The Pirates have had Korean prospects in their system since the 1990s, but it's only been recently that they've made an effort to scout and sign top prospects from the KBO, and from East Asia in general.
It’s also worth noting that his slider and changeup are also emerging and could eventually develop into plus pitches in the future. He’s been compared to a young Chan Ho Park since his early teens because of his poise, makeup and fastball.