Sandy Alcantara - Miami Marlins prospect (RHP) - 2018 MiLB ST http://www.MLBProspectPortal.com - WATCH ALL VIDEOS IN High Definition (HD) Miami Marlins RHP prospect Sandy Alcantara warming up on the mound during a 2018 minor league spring training game. For more videos of top MLB prospects, visit the MLB Prospect Portal YouTube Channel @ https://www.youtube.com/user/MLBProspectPortal