I've been thinking about this lately and wanted to get some feedback from you all.

Is there any data to suggest that draft-eligible players hurt their long-term earnings potential by signing with Scott Boras?  Sure, in the short-term they will probably get paid 'over slot' and maybe even secure an MLB deal in addition to their signing bonus.  However, do the negatives outweigh the positives?

For instance, do these players tend to struggle with the weight of expectation in the minors?  Is there any way to find out which agent has the highest success rate in terms of getting players to the majors?

I understand why Manny and K-Rod would want Boras as their agent, but why would an MLB first rounder?  Surely the difference in signing bonus is negligible and possibly outweighed by the pressure of being a Boras client.

Also, don't Boras clients often slip in the draft so that teams can pay them less?  Maybe a player slips down to a lower slot, so that a team ends up paying them for the higher slot anyway?

Has anyone seen any good articles/research on this?