Velasquez, taken with the No. 58 overall pick, hit .608 with 29 RBIs, 44 runs scored, 14 doubles, five triples, two homers and struck out only four times in 80 at-bat as a senior. He also stole 18 bases and was caught just twice. On the mound, he was 6-1 with a 1.89 ERA, 52 strikeouts and eight walks in 49 innings pitched.
"It's very exciting," Velasquez said. "I took the physical [Friday] and they were concerned about my shoulder, but they said my rotator cuff is in good shape. It's the best feeling I've ever had, and I'm ready to be an Astro."
Velasquez, who received a signing bonus of $655,800, will report to Rookie League Greeneville on Saturday.
Velasquez, 6-foot-3, had signed a letter of intent to play at Cal State Fullerton
Houston has signed 29 of 52 Draft picks, including 17 taken in the first 20 rounds. The Astros have yet to sign their top pick, Georgia high school infielder Delino DeShields Jr., who was selected with the No. 8 pick overall.