The Nationals optioned Adon to Triple-A Rochester on Sunday, Jessica Camerato of MLB.com reports.
Adon was one of three Nationals players optioned to the minors and one of 20 cut from big-league camp Sunday. Though Washington protected Adon from the Rule 5 draft by adding him to the 40-man roster in November, he's unlikely to be a factor for the big club in 2021.