MLB's Official Draft Twitter account reports that the Astros have signed the following players:
4th Round pick Bobby Doran, for $237,700
8th Round pick Jake Buchanan
9th Round pick Tommy Shirley
11th Round pick Kyle Redinger
12th Round pick Andrew Robinson
16th Round pick Chris "Biggie" Wallace
26th Round pick Alex Sogard
34th Round pick Ryan Cole
41st Round pick Bryce Lane
So that's six college pitchers, a college catcher, a college outfielder, and a high school 3B (Kyle Redinger).