Easiest way to get historical team defense rankings? (1 Viewer)

[Michael Fox Fan]

Hi all,

I'd like to do a team defense analysis looking at the historical correlation betweeen: a) Year "N" team defense ranking, and b) Year "N+1" team defense ranking.

Does anyone know where it's easiest to get 5-yr or 10-yr historical data on team defense rankings? As a starting point, I'll just use: 1) rushing yds allowed, 2) rushing TDs allowed, 3) passing yds allowed, 4) passing TDs allowed. Ideally, I'd expand the analysis to included FF points allowed by position, since that is what I really care about.

For those interested, this is an offshoot of the latest Phil Rivers discussion.

Thanks in advance for any suggestions y'all have.

~MJF

 

[Chase Stuart]

http://www.pro-football-reference.com/years/tmstats2006.htm

 

[Jene Bramel]

Hi all,

I'd like to do a team defense analysis looking at the historical correlation betweeen: a) Year "N" team defense ranking, and b) Year "N+1" team defense ranking.

Does anyone know where it's easiest to get 5-yr or 10-yr historical data on team defense rankings? As a starting point, I'll just use: 1) rushing yds allowed, 2) rushing TDs allowed, 3) passing yds allowed, 4) passing TDs allowed. Ideally, I'd expand the analysis to included FF points allowed by position, since that is what I really care about.

For those interested, this is an offshoot of the latest Phil Rivers discussion.

Thanks in advance for any suggestions y'all have.

~MJF

Yearly data at pro-football-reference.com

 

[Jene Bramel]

http://www.pro-football-reference.com/years/tmstats2006.htm

 

[Michael Fox Fan]

chase & jene - you both rock! are you aware of anyone previously doing this analysis? if so, i'll go back to doing my actual paying job today - but otherwise, this would be more fun.

 

[Jene Bramel]

chase & jene - you both rock! are you aware of anyone previously doing this analysis? if so, i'll go back to doing my actual paying job today - but otherwise, this would be more fun.

I'm not aware of anything, although others are always more aware than I.

 

[Chase Stuart]

chase & jene - you both rock! are you aware of anyone previously doing this analysis? if so, i'll go back to doing my actual paying job today - but otherwise, this would be more fun.

http://www.pro-football-reference.com/articles/defcc.htmObviously this is a few years old, but scroll down about halfway.

I've also done some work for my QBBC article that looks at the correlation between four custom passing allowed statistics and how they hold from year to year. Generally it was between 0.3 and 0.4, which isn't very strong, but not much worse than the relationship for offenses.

 

[Michael Fox Fan]

chase & jene - you both rock! are you aware of anyone previously doing this analysis? if so, i'll go back to doing my actual paying job today - but otherwise, this would be more fun.

http://www.pro-football-reference.com/articles/defcc.htmObviously this is a few years old, but scroll down about halfway.

I've also done some work for my QBBC article that looks at the correlation between four custom passing allowed statistics and how they hold from year to year. Generally it was between 0.3 and 0.4, which isn't very strong, but not much worse than the relationship for offenses.

Thanks chase. interesting stuff - am going to update it over the next few days.

 

[David Yudkin]

chase & jene - you both rock! are you aware of anyone previously doing this analysis? if so, i'll go back to doing my actual paying job today - but otherwise, this would be more fun.

To add more feedback on this, I've studied team defense in terms of points allowed, and it seemed very even that teams overall from year to year had an equal probability in moving up, moving down, or staying the same. Some clearly stayed elite and others remained terrible, but the rest was a bit of a cra*pshoot.If I can find the link I'll post it, but the new site design has me struggling to find it.

 

[Tiger Fan]

any update on this? I was curious about thevery same thing.

 

[Chase Stuart]

Ideally, I'd expand the analysis to included FF points allowed by position, since that is what I really care about.

After adjusting for strength of schedule (which I think is appropriate), here are the correlation coefficients for FP allowed to opposing QBs by the 32 teams from Year N to Year N+1:2005-2006: 0.1352004-2005: 0.3552003-2004: 0.237Last year, for example, San Francisco went from historically terrible at stopping opposing QBs, to just slightly below average. And the Raiders went from slightly above average at stopping opposing QBs, to incredible. The big movers were the Patriots, though. They went from ranking 3rd worst to 3rd best.