Jackson was optioned to Triple-A Oklahoma City on Monday, Fabian Ardaya of The Athletic reports.

EDGE Analysis

After giving up two earned runs over four innings out of the bullpen Sunday, Jackson will once again return to Triple-A. He's fared well in his four appearances this season, putting up a 1.86 ERA and 1.34 WHIP over 9.2 innings. However, with the return of Tony Gonsolin (forearm) from the injured list, Jackson serves as the roster casualty.