Stanley Rosario signed for $300k during the 2017 international signing period. Originally from New York, Rosario signed out of the Dominican Republic. He has a large projectable frame and an already solid build for 17 years old.
Rosario’s main calling card is left-handed power. He has explosive bat speed and has shown an ability to barrel balls. His swing can get unbalanced at times and long, expanding the zone, leading to swing and miss. The hit tool is currently lagging behind the game power. The hit tool is current 20 with a future 45.
Improvement in the hit tool will unlock his potential 60 game power. Rosario needs to improve pitch recognition and patience at the plate to reach his potential. At present, Rosario gets excellent extension producing line drives with carry. He flashes plus raw with a peak 65-70 raw power. For the most part, he keeps his front shoulder closed against left-handed pitching and trusts his hands.
Rosario has a pull approach leaving him vulnerable to off-speed away. He will need to start working to left-centerfield and up the middle to reach his potential. Unlike most of his teenage teammates, Rosario doesn’t sell out at the plate, which leads me to believe he can make the adjustments needed.
Defensively, Rosario profiles as a bat-first LF. He is a below-average runner and will lose a step with added size, which could affect his ability to play adequate LF defense.
Overall, Rosario is an intriguing prospect to follow. The power before hit profile and lack of overall athleticism lead to a Future Value of 45 with extreme risk. However, Rosario has shown enough power and bat speed to warrant the follow.