1 of 14

Jay LaPrete/Associated Press

When I was first breaking into scouting right out of high school, I emailed and talked on the phone a lot with Charley Casserly, who was the general manager of the Houston Texans at the time. One thing he told me then that I try to always remember now is that scouting is fluid. No grade should ever be filed and forgotten.

More information is always coming in on players. That may be more game film, more workout results or more information from area scouts about things like character and medicals.

Where am I going with this?

All that is to say that grades should change, and if you're comparing this big board to the one I did a month ago, you're going to see some changes. Some of that is due to injuries or having time to catch up on a prospect or an underclassman's declaration that shuffles the rankings. And it should be noted that these rankings are changing every day thanks to underclassmen declaring before the January 18 deadline.

This is not a final big board but a look at how the rankings are in early January. If your favorite player is missing, it could be due to his value not being in the top 100, or it could be that as a one-man show, I've simply missed him. If that's the case, ask me in the comments or on Twitter, and I'll point you in the right direction.