Five hundred and nine days. That is how long it has taken Burnley to go from securing one of the finest promotions in their history to sitting rock-bottom of the Championship with just three points from seven games. The numbers behind that decline, particularly at the back, are as sobering as any seen at Turf Moor in recent memory.

The gold standard they set

Cast your mind back to 21 April 2025. A 2-1 win over Sheffield United at Turf Moor clinched promotion back to the Premier League with two games to spare, completing a record-breaking campaign under Scott Parker. That Burnley side kept 30 clean sheets in 46 games, conceded just 16 goals all season and accumulated 100 points. Their save percentage across the campaign stood at an impressive 85.6%, with James Trafford playing all but one fixture. It was, by any measure, a defensive masterclass.

That 2024-25 back line was built around continuity. Maxime Esteve played all 46 games; Connor Roberts was a reliable presence; Lucas Pires contributed across 34 appearances. The unit knew its shape, its triggers and its lines. It took an entire season to concede those 16 goals.

A completely different picture now

Burnley have already conceded 16 goals in the opening seven games of this Championship season. According to BBC Sport, only one of the 92 English Football League clubs has let in more at this stage. That unwanted company makes grim reading.

Nicky Hayen, appointed on 10 July after a protracted managerial search following Scott Parker's departure, has shuffled through nine different players across the backline in those seven matches. Connor Roberts is the sole survivor from the promotion campaign's starting defence, redeployed at left-back. Bashir Humphreys has featured twice. Lucas Pires came off the bench at Swansea. Beyond those three, the defensive continuity that defined 2024-25 has simply not existed.

Esteve's summer move to RB Leipzig following relegation removed the most consistent performer from that back five, and his absence has been keenly felt. Kyle Walker, now 36, has started six of the seven league games, most recently at centre-back, in what amounts to a significant change in personnel and profile.

Individual errors compounding structural issues

Hayen was candid after Saturday's 3-1 loss at Swansea. "We started actually quite well, we created as many opportunities as Swansea in the first half, but we made two individual mistakes and we are 2-0 down," he told reporters. "They managed the boxes better than we are doing at the moment."

Those individual errors have been a recurring theme. Goalkeeper Max Weiss, a 22-year-old German who joined from Karlsruhe and made just seven appearances in all competitions last season, has started every minute of this campaign. His save percentage currently stands at 50%, compared to the 85.6% posted by the entire unit last term. A heavy touch contributed to Swansea's opening goal; a poor backpass from Ugo Raghouber allowed a second. Earlier in the season, a sliced clearance from Anel Ahmedhodzic and slack defending from a set piece allowed Norwich to lead 3-0 inside 21 minutes in a 4-1 defeat.

Swansea was, notably, the first occasion on which Hayen selected the same back line in consecutive games. Building any coherent defensive shape is difficult without that minimum level of consistency, and five weeks into the campaign, it is still not established.

The historical context and what comes next

BBC Sport's analysis of Championship data since 2004-05 identifies only 15 sides that have conceded 16 or more goals in their opening seven matches. Five of those were relegated. Only one, Southampton in 2023-24, recovered well enough to win promotion, and that side had already accumulated 10 points from those seven games: seven more than Burnley have managed.

The question supporters are asking is whether this represents a temporary crisis of personnel and cohesion, or something more structural. Hayen's squad was assembled quickly, with the manager himself appointed less than a month before the season began. There has been little time to implement a clear defensive identity.

The next opportunity to arrest the slide comes at Turf Moor, where all three of Burnley's points this season have been earned. The opposition is Derby, sitting one place and one point above the Clarets, and with just six goals scored themselves: the second lowest return in the division. A low-scoring home win would not solve everything, but it would at least stop a winless league run that now stretches back to February.

The string on the yo-yo, as BBC Sport puts it, has gone worryingly slack. How quickly Hayen can restore the tension, particularly at the back, will define whether this Championship stay is a brief stopover or a longer-term residence.

Frequently asked

Why are Burnley struggling so much defensively this season?
A combination of factors is contributing: key defenders from the promotion campaign have departed or moved on, goalkeeper Max Weiss is still finding his feet at Championship level, and Nicky Hayen has used nine different players across the backline in just seven games, making it very difficult to build a consistent defensive shape.
How does Burnley's defence this season compare to their 2024-25 Championship campaign?
The contrast is stark. Burnley conceded just 16 goals across all 46 games in 2024-25, keeping 30 clean sheets with a save percentage of 85.6%. This season they have already let in 16 goals in their opening seven Championship matches.
Can Burnley avoid relegation after such a poor start?
It is historically very difficult. According to BBC Sport's analysis, only one club has conceded 16 or more goals in the first seven Championship games and gone on to win promotion. Five of the 15 clubs in that situation were relegated. Burnley have three points from seven games, though their next match is at home, where all their points have so far come from.