I can definitely understand why you would want to go pro after 3 seasons.
Like mentioned above, Alvester left to help his family. The argument that he would have had better draft stock can be made, but the argument can me made that he had done everything possible for his size and speed and skills in Dave Christensen's offense.
Either way, he is a millionaire now because practice squad pays something like 480K a year, and he has been there 3 seasons now.
If I hated school, was going to be a 6th round pick, and didn't see myself becoming a 3rd round or higher draft pick, and didn't really care all that much about becoming a legend in the school record books, but just wanted some financial security, why risk an injury? Why risk waiting around...You never know what could happen that would screw you over.
You don't know when a simple fight at the Buck turns into a felony arrest. You don't know when your laziness in the classroom turns into being suspended and not playing at all.
Go pro, get the money, I get it.
But if you want to be a star, if you want to become a legend in the school record books on your way to becoming an NFL legend, then I think you should stay. Andrew Luck will always be remembered at Stanford, but then again he was a sure first round pick from the time he turned 16.
If I was Brett, I would have stayed. If I was Alvester, I would have left when he did.
I guess it just comes down to your priorities and dreams, and unfortunately, some bad advice.
What kind of grade was Brett given? Compare that to Bortles or Manziel?
How many of these underclassmen were told they would be 4th round picks?