Mel Kiper's way-too-early Big Board: Top 25 2018 prospects

Exciting crop of QBs headline Kiper's way-too-early Big Board (1:37)

Mel Kiper Jr. breaks down QBs Sam Darnold and Josh Rosen, who rank in the top 10 of his way-too-early 2018 Big Board, and the challenges they'll face this season. (1:37)

Say so long to the Class of 2017. It's time for my annual way-too-early look at next year's (potential) NFL draft class.

So how'd I do last year? Well, three from my top five went in the top six in the 2017 draft -- Myles Garrett (1), Leonard Fournette (4) and Jamal Adams (6) -- and another went 12th (Deshaun Watson). Tim Williams, on the other hand, dropped all the way to No. 78 after an inconsistent season. A few others dropped big time or returned to school for another season, but overall it was pretty solid.

A few notes on my first 2018 Big Board:

  • I'm not going to be too scouting-heavy here. My own reports on these guys are still half-formed, and so much will change between now and the 2018 draft.

  • Keep in mind that several prospects here have only started one season, and so I'm projecting based on size, athletic ability, statistics and what I hear from people around the league.

  • Speaking of sizes, what's listed here is what schools give out. These could vary greatly when players show up for the 2018 combine. True height and weight really matters for almost every position.

Check out Todd McShay's first 2018 mock draft, and come back next week for my way-too-early rankings across every position group.

Note: One asterisk denotes a junior, and two asterisks denote a redshirt sophomore for the 2017 season.

1. **Sam Darnold, QB, Southern California

Darnold has everything NFL teams want in a starter. He has a big frame (6-foot-4, 225 pounds), makes quick decisions and is an accurate and natural passer. He completed 67.2 percent of his passes last season and ranked second in the nation in Total QBR (86.8). He does have an unorthodox, long delivery, however, that will have to be retooled. And the third-year sophomore has only started 10 games.