Rondon was added to the Cardinals' 60-man roster pool and will report to the alternate camp in Springfield, Jeff Jones of the Belleville News-Democrat reports.
Rondon spent 2019 at Double-A Springfield and had a strong season with a 3.21 ERA, 1.23 WHIP and 112:42 K:BB over 115 innings. The 22-year-old is likely a longshot to see the majors in 2020 since he's heading to the alternate site, but his inclusion in the 60-man pool could be significant for his development with the cancellation of the minor-league season.