Rondon was optioned to minor-league camp Saturday.
Rondon's contract was selected in November to protect him from the Rule 5 draft, and he spent the first month of spring training at major-league camp. He made four relief appearances this spring and allowed five runs (two earned) on two hits and two walks while striking out four over 2.2 innings. The right-hander will likely begin the season with Triple-A Memphis but could make his major-league debut at some point in 2021.