The Astros selected Santa's contract from Triple-A Sugar Land on Friday.
To make room for the 23-year-old on the big-league roster, Jayden Murray was optioned to Triple-A. Santa will be looking to make his MLB debut during the Astros' weekend series at Wrigley Field. In 18 games with Sugar Land this season, he logged a 2.37 ERA, 0.90 WHIP and 24:7 K:BB across 19 innings.