A late bloomer, Vizcaino was nearly 19 when the Yankees signed him for $14,000 out of the Dominican Republic in May 2016. He spent most of his first three pro seasons in Rookie ball before his fastball and changeup improved significantly in 2019. He showcased the best combination of stuff and polish in an all-prospect rotation at Class A Charleston last year.
After operating more in the low 90s in the past, Vizcaino dealt with a 94-98 mph fastball and reached 100 in 2019. His changeup can be even more devastating, arriving in the low 90s with splitter action and earning some plus-plus grades at its best. The key for him going forward will be to develop a more consistent breaking ball, because his low-80s slider can be a solid offering at times but gets slurvy too often.
In addition to upgrading his pitches last season, Vizcaino also did a better job of throwing strikes. The next step will be to refine his command. He has the upside of mid-rotation starter and could become a high-leverage reliever if he winds up in the bullpen.