Kiper's preseason 2019 Big Board and position rankings for NFL draft

Defense tops Kiper's preseason Big Board (1:27)

Mel Kiper Jr. breaks down why DT Ed Oliver, DE Nick Bosa and DT Rashan Gary are the top three players on his 2019 preseason Big Board. (1:27)

College football is back, and so am I. Time for another batch of my top 25 overall prospects and position rankings for the 2019 NFL draft. There are a few changes from my way-too-early Big Board.

A few notes before I get started (same as always):

  • These aren't detailed scouting reports. I still have a lot of work to do on these prospects, and what they do from now until January matters a lot.

  • The draft is all about projection, so keep in mind that several guys here have started only one season.

  • Height and weight are based on what we have from schools. We don't get official numbers until the 2019 combine.

Here we go, and I'll include where you can watch all 25 prospects in Week 1. You can go straight to the position rankings here.

Note: One asterisk denotes the player is a junior, and two asterisks denote the player is a redshirt sophomore in 2018.

1. Ed Oliver, DT, Houston*

Height: 6-foot-3 | Weight: 292 pounds

Oliver is just relentless on tape. He never quits. He's the best interior pass-rusher in this class, though he's not quite Aaron Donald, even though those are the comps he's going to get. Oliver uses a quick first step to wreck plays before they can even get started -- he has 39 tackles for loss in two seasons.

Week 1 matchup: at Rice on Saturday at noon ET on CBSSN.