In pure EPA-per-dropback terms, what Jacksonville pulled off in 2025 was one of the largest single-season pass-defense rebuilds of the modern era.

Table of Contents

1. The rank swing, in context
2. Where the fix actually happened
3. It wasn't the pass rush
4. What this all adds up to

1. The rank swing, in context

In 2024, Jacksonville allowed +0.197 EPA per dropback on defense — dead last (32nd) in the NFL. In 2025, that flipped to -0.119 EPA per dropback, 4th-best in the league. The full-defense picture moved with it: overall defensive EPA/play went from +0.129 (31st) in 2024 to -0.086 (6th) in 2025, and points allowed dropped from 435 to 336 over the same 17-game slate.

How historic is a +0.316 EPA/dropback swing in one year? Since 2010, only two defenses have posted a bigger year-over-year pass-EPA improvement:

By rank movement it's a similar story — Jacksonville climbed 28 spots (32nd → 4th) in pass EPA allowed. Since 2010, only the 2011 Texans (31 spots) and 2020 Dolphins (29 spots) have moved farther; the 2024 Eagles matched Jacksonville's 28-spot climb.

That's the company we're in: J.J. Watt's rookie year in Houston, the Brian Flores 2020 Dolphins, and now this.

2. Where the fix actually happened

Here's the part that gets lost in the highlights. The Jaguars didn't get league-average across the board — they got elite in the middle and deep parts of the field, exactly the areas that were killing them in 2024.

Broken out by target depth, 2024 vs. 2025 (Jacksonville defense):

Read those bottom two rows again. On intermediate throws (10–19 air yards), Jacksonville allowed a completion rate of 44.4% — over 8 points below the 2025 league average of 53.0% — and cut opponent EPA/play from a catastrophic +0.540 to +0.069. On deep throws (20+ air yards), opponents completed just 34.1%, better than the league average of 36.5%, and posted a Jaguars-facing EPA/play of +0.117 vs. the league average of +0.438.

The takeaways landed in bunches. Interceptions on intermediate and deep throws combined jumped from 2 in 2024 to 12 in 2025 — seven picks on intermediate routes (up from one) and five on deep balls (up from one). Total defensive interceptions climbed from 6 to 22.

That's not variance. Random turnover swings don't move a coverage's completion rate 10+ points at two separate depth bands at the same time. This defense fundamentally changed what quarterbacks were allowed to see downfield.

3. It wasn't the pass rush

Now the counterintuitive part. If you'd been told before the season that the Jaguars were about to leap from 32nd to 4th in pass EPA allowed, you'd probably assume the pass rush went nuclear. It didn't.

Sacks actually declined, from 34 in 2024 to 32 in 2025. Opponent pass attempts rose (from 618 pass plays including sacks to 672), which means the sack rate ticked down, too. Pass touchdowns allowed did drop — from 29 to 25 — but the yardage picture (4,605 yards allowed in 2024 vs. 3,933 in 2025) is driven by the same coverage story we already saw: fewer completions completed for shorter gains on the deep and intermediate throws that used to torch this team.

In other words, the turnaround wasn't built at the line of scrimmage. It was built 12–25 yards downfield. Jacksonville stopped losing the middle third of the field, started taking the ball away when quarterbacks tested it, and made deep shots a low-percentage bet.

4. What this all adds up to

I'd argue the two takeaways here are worth carrying into next season with some caution.

First, historically, the biggest one-year pass-defense turnarounds have been sticky-ish but rarely a permanent new floor. The 2011 Texans stayed excellent for a stretch. The 2020 Dolphins regressed. What Jacksonville did in 2025 is real, but it's important to understand what was real about it — this wasn't a "we finally have a pass rush" season, and takeaway-driven improvements historically have some regression baked in.

Second, and this is the part I'd want to see stress-tested: the intermediate/deep coverage numbers — 44.4% and 34.1% completion allowed — are the kind of numbers that scream scheme and safety play more than star cornerback play. If those are repeatable, this defense is a top-5 unit again in 2026. If they were a coverage-and-luck combination that opponents figure out, the pass rush hasn't shown enough (32 sacks) to bail the group out.

Either way, one thing is settled: the 2025 Jacksonville Jaguars didn't just have a bounce-back defense. By EPA/dropback, they engineered the third-largest one-year pass-defense improvement of the last 16 seasons, and they did it in the exact place — the middle and deep parts of the field — where a defense's identity actually lives.