Anthony Costanzo shows upside
Four offensive tackles heard their names called on the first day of the 2010 draft, including three in the first 11 picks, but there does not appear to be the same kind of depth at the top of the 2011 class.
Only three prospects have first-round grades at this point and none project in the top half of the first round. Positional value will likely inflate the grades of the top prospects as the pre-draft process goes on, but right now there might not be an offensive tackle prospect on the board with the overall skill set to compete for a starting job as a rookie.
Here's how we break down the top five tackles on our board at this point in the process.
Which offensive tackle is currently atop the 2011 class? Who has the tools to become an NFL starter, and which tackles are fits for zone-blocking schemes? Become an ESPN Insider to find out.