02 August 2012

By The Numbers: Inside Domes and Out

photo courtesy of SI
Since 2006, the beginning of the Payton-Brees era in New Orleans, the Saints have played 104 games in the regular and post seasons.

Of those games, 51 have been at home and 53 on the road.

While it's fairly common knowledge that the Saints have been one of the NFL's best road teams under Payton, ranking third in total victories since 2006 and first since 2009, there's still conventional wisdom among pundits and in national media circles that suggests the Saints are a much different (read: worse) team on the road.

While part of that perception stems from high-profile postseason losses in difficult outdoor venues (Chicago '06, Seattle '10, San Francisco '11), it's hard to tell if that perception has any truth to it. The distinction that's often missed is in separating road games in domes from road games played outdoors.

Of the 53 road games under Payton, the Saints have played 13 of those games (~25%) in domes and have lost only three times (Indy '07, Atlanta '08, St. Louis '11). Playing in road domed environments has hardly proven difficult. But what about those other 40 games played outdoors?

First, here's a look at yards gained/allowed and points scored/allowed in dome and non dome venues under Payton:

More importantly, here's a snapshot of the Saints W/L record in the two settings, along with some accompanying stats:

That's a fairly stark disparity in win percentage, and certainly indicates that the Saints aren't nearly as good outdoors as they are in a dome. I know this isn't much of a revelation, but the numbers more clearly and specifically illustrate it. I've been as guilty of this as anyone, but it seems disingenuous to state in blanket that the Saints are an elite road team. In a way it's true, but that statement needs to come with a qualification: dome game or outdoor game?

Put the Saints in a dome, whether that be in New Orleans or elsewhere, and they're probably the best team in the NFL. Outdoors, though, they're much closer to "good" than they are to "great."

Above, the stats that seem most important are turnover margin and passer rating differential ("QB Rating Diff.").

The turnover margin speaks for itself, and has been beat to death over the past several years so I'll refrain from rehashing it here. What's really surprising (or not) is that the Saints are -15 in aggregate turnover margin since 2006. The fact that they've been able to overcome that to become one of the NFL's best teams speaks volumes for their talent, coaching, and persistence.

The second noteworthy stat, passer rating differential, measures the difference between Brees' passer rating and the Saints' opponents' passer ratings. Kerry Byrne of Cold Hard Football Facts and Sports Illustrated refers to passer rating differential as the "mother of all stats." Byrne sums it up like this:

Passer Rating Differential is the most important stat in football. It's the one indicator virtually guaranteed to separate winners from losers ... Put most simply, wins and losses move in lock step with Passer Rating Differential (PRD) ... How good is the stat? Consider that 40 of 71 NFL champs since 1940 (56 percent) finished No. 1 or No. 2 in Passer Rating Differential.
In domes, the Saints have posted a blistering +20.6 PRD, but it falls way off  to +7.5 outdoors. Why? Mostly because of Brees being less than amazingly good and the Saints' D being anything more than mediocre. It's also fair to say that Brees' ratings, in whole, mirror the overall efficiency of an offense that operates at its peak absent random weather and field conditions.

The Saints' defense has been incredibly consistent, if not spectacularly mediocre, at defending opponents' passing attacks both indoors and out. Under Payton, opponents have posted a 83.5 passer rating in domes and an 84.6 rating outside. It's Brees' performance that has produced a bit more volatility. Take a look:

When Brees' performance is less-than-superhuman, the Saints seem to be eminently beatable and that happens more frequently when they're outdoors. Is it fair to say that the Saints are largely dependent on the performance of Brees? I think so. Groundbreaking analysis, I know.

Brees has been so good in domes, averaging a passer rating of 104.1, that the Saints have won 70% of their games by outscoring opponents by more than a touchdown per game. For better perspective, Brees' passer rating in domes equates exactly to that of Aaron Rodgers' career passer rating which ranks #1 all time.

All of this is to say what's intuitively graspable: Brees and the offense are at less than their best outdoors, not simply on the road. And because the Saints have lived and died on the merits of their offense under Payton, when the offense is at less than its best, the team is vulnerable.

While it's factually accurate to say the Saints are one of the NFL's best road teams, that's really just a compartmentalized way of saying they're one of the NFL's best teams. But simply assuming that the Saints are one of the NFL's elite road teams doesn't really dig beneath the surface to find a second layer that's perhaps more revealing.

Since 2009, the Saints have been a bit better outdoors (13-7, 65%). The problem is that, aside from the Super Bowl, they've lost each of the outdoor games that I would identify as the most challenging: Baltimore '10, Seattle '10 wildcard, Green Bay '11, San Francisco '11 divisional.

In those four games, they're -7 in turnover margin and their PRD is a whopping -17.1. Lastly, they've surrendered a soul-crushing average of 37.3 points in those games. So maybe not much is changing, but it's a new year so there's hope.

Will it change for the better this season?

The Saints play six games outdoors this year: Carolina (wk 2), Green Bay (wk 4), Tampa Bay (wk 7), Denver (wk 8), Oakland (wk 11), and the Giants (wk 14). It will be interesting to see if the past six seasons are a predictor of 2012's outdoor results, or if a new defense and an effective running attack can bridge the gap between "good" and "great."


  1. You let me know when you're ready to write for Saints Nation. This is a masterpiece.

  2. You need to do your homework a little better. The Saints lost in a dome at Arizona 2 years ago.

    1. You must be a Cardinals fan who is still stung from the ignominious defeat your guys suffered at the hands of the Saints.

      You remember that game, Greg?

      Right before we won the SUPER BOWL.

  3. Greg, you're right. I forgot that the Cardinals play in a stadium with a retractable roof. I did an exhaustive amount of research for this post; I just mistakenly overlooked the AZ game. I wouldn't attribute the oversight to not "doing my homework."

  4. Greg, you're the type of pompous fucking idiot that give pompous fucking idiots a bad name. I bet you still have your Kurt Warner jersey. I would love to go on berating you for a being a totally fucking loser. But, I won't. I'll just say that if after reading this article and your comment is a reflection of what you took from it,..than I simply feel sorry for you. Keep the articles coming and ignore jagoffs like Greg. He has nothing better to do than to look in the mirror and sit around and smell his own farts.