Coronil, 18, is one of eight players in our top 20 who made their professional debuts in 2025. The Venezuela native was a highly sought-after January international free agent. San Diego landed him with a $900,000 signing bonus. MLB.com ranked him 35th in its international prospects top 50. A few months after signing, he saw regular action with Padres Gold in the Dominican Summer League.

A big part of his appeal is his reputation as an elite fielder. MLB.com has already assigned him a 65 field grade on the 20-to-80 scouting scale. His four errors in 14 games at shortstop and eight errors in 27 games at third base last year look like the work of a young player at the start of his pro career.

His arm, run and hit grades are listed at 50 each, and his power grade is 35. The slug could emerge once he grows into his body; he's listed as 6-3 and 162 pounds. And his running grade might be a bit low after his 8-for-8 on steal attempts.

The Padres are famous for rushing young prospects through their system, but they might need to be patient with Coronil after a middling debut.