Amed Rosario, Mets

Just 23 years old, Rosario started showing his potential late last season. In August and September, he batted .284 with five home runs in 54 games. During his 100 appearances before that, he mustered just a .237 average with four homers. Rosario has been inconsistent in the field although that could easily change with more experience. He was rated as the #8 prospect according to Baseball America heading into the 2017 season.