Joan Adon DVOA, Advanced Stats, & Fantasy Rankings

The Washington Nationals designated right-hander Joan Adon for assignment on Wednesday to make room on the 40-man roster for recently signed infielder Amed Rosario. Adon gets booted off the team's 40-man roster after giving up eight earned runs while walking four and striking out six in 10 2/3 innings over eight outings (one start) at the major-league level in 2024. He's only thrown 132 1/3 innings in his big-league career with the Nationals since debuting in the majors in 2021 and has a rough 6.66 ERA (5.09 FIP) and 1.69 WHIP while striking out 118 and walking 70 in 35 appearances (26 starts). The 26-year-old finished last season on the shelf with a biceps strain but should be fully healthy for the start of the 2025 campaign. If he clears waivers, it's possible Adon returns to the Nationals and begins next season on the farm.

Washington Nationals right-hander Joan Adon was called up from Triple-A Rochester on Tuesday and will make the start against the San Francisco Giants on the road. Adon was brought up to replace right-hander Josiah Gray (elbow), who landed on the 15-day injured list. Depending on how long Gray ends up being out and how Adon performs in Washington's starting rotation, the 25-year-old could stick around in D.C., making him worth a look as a waiver-wire pickup in NL-only leagues. He has above-average velocity and gets frequent ground balls, although he had a rough 6.45 ERA with 24 walks and 48 strikeouts in 51 2/3 innings over 12 appearances (10 starts) for the Nats in 2023. Unless he shows more consistency than he has in the last three seasons in the big leagues, fantasy managers in mixed leagues can probably ignore him.