Upon further research, there is no reason to to give picks 19 & 20 more than $150,000 signing bonus, the max allowed to not count against the bonus pool. So those of you thinking the team is willing to pay millions of $$$ for these 2 picks and that will drop the amount offered to Jenkins should report to medical immediately with your sample cup. The Twins have $7.3 MM left in their bonus pool, that is slot value for the #5 pick this year.
If there are medical concerns (not a first for a Boras client) and the team is trying to offer less that is one thing, but if Boras is trying to negotiate more for his client because he believes he should have went higher, that is another. He was selected 5th and the team selecting him has the amount pegged for that position left in their bonus pool, he should sign.
If he is using UNC as a bargaining chip, that is a big gamble ($7 MM big). He could get hurt, he could have a bad college career, he could fall further down the draft board because of another loaded draft or other factors.