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Anyone follow FootballOutsiders' DVOA rankings?

The story seems to be that a bunch of 1) Stat nerds who are also 2) NFL fans got together with the purpose of using stats to analyze the NFL teams and arrive at the almighty Accurate Prediction.

Their system: DVOA, which stands for Defense-adjusted Value Over Average. The basic idea (I'm not an expert) is apparently that they collect up all of the play-by-play reports of each and every NFL game, and contrast how each team did in particular situations versus how the rest of the league did in that situation. For instance, they count how many 3rd and 8 situations occurred in the league over the course of the season.... thus far, all of one week... and rank the teams according to how many yards they got... ie, how successful the play was overall. At this point, it gets heavily stat nerdy, and I don't go under the hood for that kind of work.

Eventually, they also compute overall strength of the team defenses and take that into account also.

The end product is a DVOA number, which allows the teams to be ranked, and overall strength of the team can be assessed, especially in comparison to the team they play for the week.

After week 1, the Broncos are ranked 16th overall, with offense 21st, and defense 11th. Defense strength is not taken into account thus far, due to lack of data. But the offense's ranking is a bit of a surprise, because they're apparently better than 10 other offenses after that lackluster performance.

The overall rank would suggest that, if the trend established in week one continues, we'll end up around 8-8.

The Browns, by the way, rank 26th overall.

I'm not sure what to think of DVOA rankings, since I've only vaguely been aware (and barely understood) them.

Anyone else have an opinion about them?

link:

http://www.footballoutsiders.com/dvoa-ratings/2009/week-1-dvoa-ratings

This is a Fan-Created Comment on MileHighReport.com. The opinion here is not necessarily shared by the editorial staff of MHR

Comment 15 comments  |  2 recs  | 

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I'm not quite sure about all that.

I haven’t followed the DVOA rankings and don’t really know how they calculate all of that stuff, but I don’t see how Denver can be 31st. They won!!!!!

I don’t know. Maybe they stopped calculating after the Bengals Touchdown.

Bringing Bronco love from 1,112 miles away

by Troy Hufford on Sep 16, 2009 4:23 PM MDT reply actions  

Broncos were 31st in preseason

They are 16th after week 1.

But the preseason ranking begs the question: how did they come up with that?

by ZooTown on Sep 16, 2009 4:26 PM MDT up reply actions  

Oh, I see.

Well, they probably based the preseason ranking off of the first game nightmare that was Kyle Orton.

He improved, but the MSM was still down on the whole “lots of interceptions and a third string starting quarterback and your first stringer has a jacked up finger” thing.

Bringing Bronco love from 1,112 miles away

by Troy Hufford on Sep 16, 2009 4:35 PM MDT up reply actions  

31st is based on

Week 1 actual performance plus their projected performance for the year. The rankings are pretty meaningless at this time of year. Give it about four weeks for real trends to emerge. Their stuff is pretty interesting. Smarter stats. For example, their system rewards teams more for gaining 2 yards on 3rd and 1 than gaining 10 yards on 3rd and 15.

Still stats never really tell the whole story in football. Their annual — this year self-published as Football Outsiders Almanac (formerly Pro Football Prospectus) is a very good read if you are the analytical type.

Keep Moving Forward.

by ColoradoOwl on Sep 16, 2009 10:42 PM MDT up reply actions  

Too Early To Tell

We have one data point. There are not trends to compare yet. Preseason is a joke.

When you can do the common things in life in a uncommon way, you will command the attention of the world.
- George Washington Carver

by Kfustud on Sep 16, 2009 4:30 PM MDT reply actions  

DVOA

Interestingly, this has held up surprisingly well for the last couple of years. The major exception being the Patriots/ Giants Super Bowl game which caught quite a few of us by surprise.

Imagination is more important than knowledge. A. Einstein

by Ponderosa on Sep 16, 2009 4:36 PM MDT reply actions  

Really? That surprises me

The brief account of how it is developed leaves lots or room for pot-shots about the basic design. Perhaps it is more complex than I am picturing.

by idahobronc on Sep 16, 2009 9:15 PM MDT up reply actions  

I know. Be wary of statistics.

However, as single statistics go this one has been valid. I don’t begin to claim to understand it’s nuances, but it has proven to be fairly predictive.

Imagination is more important than knowledge. A. Einstein

by Ponderosa on Sep 16, 2009 10:09 PM MDT up reply actions  

I have an opinion..

We will beat the Bowns…
.

Playoffs here we come!!

Guardian of the Gate to La La Land!
Gonsoulin, Taylor, Little, Wright, Gradishar, Atwater, Davis, and Sharpe...
Why are they not in the Hall...I just don't understand.

by Mike Clark on Sep 16, 2009 8:11 PM MDT reply actions  

Hey Mike.

“Beat the Bowns”. Kind of a combination of Browns and clowns.

I know that’s what you meant. And I like it!

Beat the Bowns!

If this be Hell, let us make the most of it!

by Trinidad Jack on Sep 17, 2009 2:20 PM MDT up reply actions  

I'm a cautious fan of DVOA & the Football Outsiders crew

I like the methodology they use to come to their ratings. I like the fact they watch every play and break it down – including assigning success/failure to defenders.

It’s far more meaningful, then just looking at a team or a player’s raw stats.

Essentially what they are doing is analysing how succesful teams and players are at getting the job done i.e. moving/stopping the chains. After all if a player leads the league in tackles but most of the time these tackles were made after the 1st down was made, is that really a good indication of how well he has played.? DVOA is a worthy attempt to bypass the mundane stats we put upfrom the MSM.

That said I have found greater success beating Vegas simply using Walt Football’s predictions. Walt’s a bit of a sloppy analsyst, but he usually finds a way to come out just ahead by Monday evening to make a nice small profit on the weekend. He does try and break down the psychology factors for each game more and it does seem to work, even though scientifically perhaps it shouldn’t.

Despite my enthusiasm for Football Outsiders I can’t help thinking that their system needs some tuning if it is to be used effectively as a prediction tool.

by British Bronco on Sep 17, 2009 2:28 AM MDT reply actions  

I like 'em

just found the site through another FO fan…..great site with interesting approach….thx for the link and insight!!

by BideshiBronco on Sep 17, 2009 3:41 AM MDT reply actions  

The Main Goal of Football Outsiders

Is to bring a sabermetrics type attitude to the NFL. With the revolution that sport has gone under, it stands to reason that any sport can benefit from an analytical/statistics based approach. The Houston Rockets have used many concepts described in Money Ball to improve their team— they’re one of the first in the NBA to do it, and do it cost effectively.

While the numbers may be subject to hole-poking, they are making a definitive stand based on a series of outcomes, and that counts for a lot more than most analysts. I personally believe that they do a very good job, and their data on offensive lines has really helped me in fantasy football.

by legendarywalton on Sep 17, 2009 9:01 AM MDT reply actions  

yes, I agree

I will always believe that a skill at stats won’t make up for a lack of football knowledge – the game is just too complex. the numbers often are misleading, since the tackle numbers don’t include (and can’t) everyone on the tackle and many things such as ‘drops’ are helpful but ultimately imprecise. That doesn’t mean that these guys aren’t darned good at what they do, though, and their information is extremely helpful at times.

Hillis/Moreno in '09

by Doc Bear on Sep 17, 2009 5:46 PM MDT reply actions  

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