No draft pick (aside from maybe Andrew Luck) comes with a guarantee. There's risk involved in every selection, but some players require more development than others.
Here's a list of eight draft-eligible prospects for the 2013 NFL draft who will take some time to reach their full potential.
However, each of the following also has the raw skills necessary to excel in the NFL. And for that reason, they will be scouted closely this offseason as teams attempt to determine if an investment would be worthwhile.