The Astros recalled Delgado from Triple-A Sugar Land on Tuesday, Bryan Hoch of MLB.com reports.
The 26-year-old was optioned to Sugar Land on Monday but will quickly return to the majors since Jeremy Pena (calf) landed on the injured list. Delgado received his first promotion to the majors in mid-June and is batting .280 (7-for-25) with a homer, four RBI and two runs in his first 13 games.