Triple-A Sugar Land placed Alexander on its 7-day injured list June 17 due to an unspecified injury.
After the Astros optioned Alexander to Triple-A on May 27, the right-hander made two starts before landing on the shelf. He'll likely remain out through the All-Star break, though an official timeline for his return to the Sugar Land rotation has yet to be established. Alexander owns a 5.32 ERA and 1.61 WHIP across 44 innings at Triple-A this season.