Kemp announced the signing on Twitter, tweeting, "Officially a part of the Houston Astros! Thanks for all the love and support from Vandy fans the last 3 years. Always a #VandyBoy."
Kemp was Vanderbilt's leadoff hitter, taking the Commodores all the way to the NCAA super-regionals.
Jacob Thorpe is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.