Jackson was optioned back to Triple-A Round Rock on Thursday, Stefan Stevenson of the Fort Worth Star-Telegram reports.

EDGE Analysis

Catcher Robinson Chirinos was activated from the disabled list Thursday, so Jackson will head to Triple-A to free up a spot on the 25-man roster. The right-hander has made five appearances for the Rangers on the season, allowing 11 hits and six earned runs over 7.2 innings. He's fared better at Round Rock, where he holds a 3.68 ERA and 1.36 WHIP.