If he comes back for his junior season at Syracuse, he's an All-American and at least a mid to late first rounder. And by that measure, if he was the 19th pick for argument's sake, he makes $7,568,554 on a 4-year deal. After three years, that's about $4.928M.
As it stands now in his current situation, he made $4,234,674 as a second round pick over a four-year contract. Not bad, but he could have made +$700K (plus or minus, depending on draft position) in only three years. Plus another year guaranteed (which can work both ways).
I personally think he's a lottery pick the following year, which would bump him to $6.669M. That's over two million dollars more.
This is what kills me about the "it makes more sense for you to leave now and get paid sooner" crowd. Can he do what he wants and do what's best for him? Sure. And I don't fault any of them. Just trying to point out that financially, a lot of times it makes sense to bet on yourself and stay in college like Brissett is doing.
Sure, an injury could happen. But I think the risk outweighs the reward in a couple of our cases, most specifically with Grant.