From a Twins fan site beginning of the year:
"Signed for $800,000 in 2014; posted 3.18 ERA in 51 innings in rookie ball with 51/12 K/BB; made huge progress with command after having some problems with that in the Dominican Summer League in 2015; brother Michael Ynoa pitches in Chicago White Sox organization; fastball in 90-95 range but could get consistently into mid-90s as he matures; both curveball and changeup have plus potential; needs to build up workload but a very high ceiling and could be top pitcher on this list a year from now. Age 18, ETA: 2021."