On July 18, 2014 — The Astros fail to reach a deal with the top pick in the amateur draft, P Brady Aiken, as the deadline for signing players passes. The two sides had reached a tentative deal in early June, but a physical exam disclosed issues with the health of the young lefthander’s elbow, leading the Astros to lower their offer, causing the impasse. It is only the third time that the top choice in a draft fails to sign a contract, following Danny Goodwin in 1971 and Tim Belcher in 1983.
Source:
Baseball Reference July 18