3. Noah Clowney
It's well known that the Rockets are in need of an additional big man, as they've reportedly had their sights set on Brook Lopez. At 6'10, Noah Clowney has the ability to defend the basket, in addition to thriving defensively in ball-screen situations.
Clowney possesses elite athleticism and has the ability to finish in the post, which the Rockets could certainly use. Clowney also could pose a great pick-and-roll option, which would be a welcome addition for James Harden, who the masses believe will be returning to the Space City.
Clowney also has good shooting range from deep for a center. The downside is his thin frame, as he measures just 210 pounds. This posed problems for him, as he got outmuscled on the glass.
With averages of 10 points and 8 rebounds as a freshman for the Alabama Crimson Tide, the Rockets could do much worse with the 20th pick.