Joan Adon, 23, threw a 95 MPH four-seam fastball for 50 of his 94 pitches in his MLB debut (53%), getting two swinging strikes and 12 called strikes with his heater, which hit a high of 97.3 MPH, and he mixed in a slider (37%), which he recorded ten swinging and a total of six called strikes with, while throwing a changeup six times, three called strikes, and his sinker, which he used just once.
Adon, who signed for $50K out of the Dominican Republic in July of 2016, started out at High-A in the Nationals’ system this season, and made jumps to Double-A Harrisburg and then to the club’s top affiliate, Triple-A Rochester, before he was called up to start the season finale against the Boston Red Sox, who were fighting to hold onto an AL Wild Card spot.