Mel Kiper Jr. doesn't foresee Mekhi Becton's draft stock dropping too far despite his flagged drug test. (0:36)

Let's get into my final Big Board and position rankings ahead of the 2020 NFL draft.

These are my top 300 prospects overall, starting with Ohio State pass-rusher Chase Young, who has been No. 1 on my board since September, and my expanded rankings at every position. I went 20 deep at quarterback, 40 deep at cornerback and 60 deep at wide receiver.

My Big Board is not a prediction of where prospects will be drafted, only where I have them ranked. And I'll be making tweaks up until the draft begins (Thursday at 8 p.m. ET on ABC, ESPN and the ESPN App) as I talk to more sources and make adjustments. And thanks to ESPN Stats & Information for their research help.

Click the links below to go to each section:

Top 300 overall prospects

1-25 | 26-50 | 51-75 | 76-100

101-150 | 151-200 | 201-250 | 251-300

Position rankings

QB | RB | FB | WR | TE | OT | G | C

DE | DT | ILB | OLB | CB | S | K/P | LS

1. Chase Young, DE, Ohio State

HT: 6-foot-4 | WT: 264 | Highlights

Young is one of the most pro-ready edge rushers I've studied in the past decade, and he should be a force from Day 1 in the NFL.

Stat to know: Young led the FBS in sacks (16.5) and forced fumbles (six) last season.

2. Joe Burrow, QB, LSU

HT: 6-foot-3 | WT: 221 | Highlights

The Heisman Trophy winner is the favorite to be drafted No. 1 overall. His rise from late-round prospect before the season to the top pick has been an amazing story.

Stat to know: In 2019, Burrow set FBS single-season records in passing touchdowns (60) and total touchdowns (65).

3. Jeff Okudah, CB, Ohio State

HT: 6-foot-1 | WT: 205 | Highlights

Okudah is a shutdown corner with explosive traits. What's not to like?

Stat to know: Opposing quarterbacks had a 14.2 QBR when Okudah was the primary defender in coverage last season, which was the best in the Big Ten.

4. Isaiah Simmons, OLB, Clemson

HT: 6-foot-3 | WT: 238 | Highlights

It's rare to see this type of size and athleticism, and some teams think he could play safety.

Stat to know: Simmons played 120-plus snaps at inside linebacker, outside linebacker, slot cornerback and safety last season, and he even lined up at perimeter cornerback on 17 snaps.

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5. Tua Tagovailoa, QB, Alabama

HT: 6-foot-0 | WT: 217 | Highlights

I have said Tagovailoa is a wild card in this draft because of his injury history, and that's still the case. Turn on the tape and he's phenomenal, though, a super-accurate passer with everything NFL teams look for from their long-term starting quarterback.

Stat to know: Tagovailoa is Alabama's career leader in passing touchdowns (87) and completion percentage (69.3%).

6. Derrick Brown, DT, Auburn

HT: 6-foot-4 | WT: 326 | Highlights

Brown is not just a run plugger -- he has some pass-rushing upside, too.

Stat to know: Brown had 35 tackles at or behind the line of scrimmage from 2018 to '19, the fourth-most in FBS among players lined up at defensive tackle.

HT: 6-foot-3 | WT: 312 | Highlights

There are a few teams that have Wills, who played right tackle at Alabama, as the top tackle in this class.

Stat to know: Alabama averaged 7.7 yards per rush outside the right tackle in 2019, which ranked third in the FBS.

8. Jerry Jeudy, WR, Alabama

HT: 6-foot-1 | WT: 192 | Highlights

There's a chance that receivers get shut out in the top 10 picks, but this is one of the deepest wideout groups I've ever seen. Jeudy is at the top.

Stat to know: Jeudy had 44 receptions of at least 20 yards over the past two seasons, the second-most in FBS.

9. Justin Herbert, QB, Oregon

HT: 6-foot-6 | WT: 236 | Highlights

Herbert has some maddening tape because he flashes moments of brilliance with inconsistency. But the tools are there to be a high-level starter.

Stat to know: Herbert had 15 touchdowns and no interceptions on go routes last season, the second-best TD-INT ratio in the FBS.

10. Tristan Wirfs, OT, Iowa

HT: 6-foot-4 | WT: 320 | Highlights

Wirfs is tremendous in the run game, one of the most powerful prospects in this class. His 4.85 40-yard dash at the combine was the fastest time by a 320-plus-pound player since at least 2006.

Stat to know: Of Wirfs' 33 starts at Iowa, 29 came at right tackle.