De Leon was optioned to Triple-A Louisville on Wednesday.

De Leon had allowed at least two runs in each of his last three relief outings, and he has an 8.35 ERA and 1.80 ERA in 18.1 innings to begin the season. The right-hander lost out on his rotation spot in early April when Sonny Gray returned to action, and he's now off the big-league roster altogether for the time being. De Leon will attempt to sort things out in the minors after left-hander Cionel Perez was recalled Wednesday.

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