Hypothetical question

[X-Era]

So, is there tampering with college players?

Heres what I mean.

I just was checking out a draft site that says Brian Brohm is back tracking about staying for his senior year. It makes you wonder why.

I know theres a commitee that tells each prospect where they would likely go.

BUT,

Can an NFL team promise they will take a player with a likely high pick BEFORE he declares, BEFORE the combine?

And if that player has crappy workouts, or a bad combine day(s), have the team skip him completely.

So, a player opts for the draft based on an NFL teams verbal promise and then gets screwed by that team either due to bad workouts or just because?