RJM is right. While you are rightfully proud of your nephews accomplishments and can tell the site about them, to actively push his name out for awards and honors is considered poor taste. I'm sure your nephew would be embarrassed as he probably feels he will let his playing do his talking.
As far as the draft goes, if he is on the radar he probably would at least be filling out info cards for ML teams or been contacted in some way. Not always but most of the time. No one on this site is privy to information about draft rounds or who might draft someone as the draft is still more than a month away. Even though he has stellar numbers just remember there are dozens of college players with similar or better numbers or tools. Our team has a guy as our fourth outfielder for the last two years who hit .420 his last year in Juco and runs a 6.6 sixty. There are numerous talented guys out there and only around 1200+ draft slots