The Astros optioned Santa to Triple-A Sugar Land on Monday, Chandler Rome of The Athletic reports.
Santa will open the second half in the minors after making two appearances out of the bullpen during his latest stint with the Astros. The young right-hander owns a 1.17 ERA and 0.91 WHIP over his first 15.1 innings in the big leagues, though a weak 5.1 K-BB% indicates that he hasn't been nearly as dominant as the other two ratios would suggest.