Crowe has been named to the Nationals' 60-man player pool, Jessica Camerato of MLB.com reports.
The 25-year-old rose to Triple-A last season but struggled, posting a 6.17 ERA, 1.70 WHIP and 41:26 K:BB in 54 innings for Fresno. Crowe will likely be a swingman at best if he ever carves out a regular spot in the majors, but he's unlikely to make his big-league debut in 2020.