The ball is in the 49ers court, really. If he sits out, he gets no money- he can't work out with any team next year before the draft.
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So he can't change his reputation as a little slow, he cements his reputation as a diva receiva- there's no way he goes close to 10th pick next year
so he'll end up with much less. You can't be paid based on mock drafts. If you think you deserve to be top 5, prove it on the field and the money will come.
When Bo did it, he had a baseball contract- not to mention nike.