Blanco was recalled from Triple-A Sugar Land on Thursday, Brian McTaggart of MLB.com reports.
Blanco will make his first major-league start Thursday against the Angels. The 29-year-old has posted a 0.56 ERA and 21:13 K:BB over 16 innings covering two starts and two relief appearances at Sugar Land this season and a 4.50 ERA in nine relief outings with Houston. He would figure to be on a relatively limited pitch count Thursday.