Can you draft someone who didn't declare for the draft? I'm pretty sure he didn't declare.
Last I heard he was looking great pitching for a cubs farm team. Consensus is, he becomes a successful MLB pitcher. The money is better and he can play longer.
If he were trying out as a position player I would still draft him, but when you commit to trying to become a pitcher in the big leagues everybody realizes it is usually a process that takes a few years.
The fact is; he is good and probably makes it.