Little early for mock drafts, but Todd McShay's first edition of his 2014 mock draft is up ($, LINK) and he has Lewan going #9 overall to the Bills, the second OL off the board. Here's what he had to say about Lewan:
Analysis: This scenario works out well for Buffalo. The Bills need to upgrade the O-line and provide QB EJ Manuel with more time to throw, and Lewan could immediately help solidify this unit. Lewan isn't an exceptional athlete but he has enough quickness to get by when coupled with his physicality and mean streak. I've written a few times this season that even though Lewan doesn't always look like a prototype left tackle, he is very effective in run blocking and pass protection. Safety might be seen as a bigger need for Buffalo, but typically if you have a chance to take an offensive tackle over a safety in the first round, you do it.
This is pretty similar to the evaluation McShay gave him last April, when he had Lewan also going #9 overall to the Chargers:
The Chargers must protect QB Philip Rivers better. They hope the healthy return of LT Jared Gaither will fill one spot, but they would still need a right tackle in that scenario and Lewan would fit the bill. He has the length to be effective in pass protection, and he's a tenacious run-blocker who gets under the skin of defenders.