
Originally Posted by
HoustonGM
Those players tend to be of the "super prospect" type, like Alex Rodriguez. Conor Gillaspie, while a solid prospect, is far from that level. If you look at the recent list of players that were called up the same year they were drafted, it's full mostly of players that crushed the ball in the minors, like Ryan Zimmerman and Rickie Weeks. Those players also had more of a "pedigree" so to speak, as they were FANTASTIC prospects, and not just very good ones.
And as boomboom said, it starts the arbitration/free agent clock too early, as well as taking up spots on the 40-man roster.