FF defensive points allowed by position

[Ellis Dee]

The one fantasy stat I could never find was fantasy points allowed by defense for a given position. For example, let's say you plan to use a revolving TE, so each week you pick up the best TE available and start him. Normally you look at the top 5 or 6 scoring TEs available and choose the one who faces the weakest defense. But what defenses are weak against TEs? That's the great unanswerable question. Until now.

I have written a data capture program that lets me copy & paste yahoo fantasy stats for everyone in the league each week. Each page displays 25 players, and each week has around 300 players who get in the game, so it takes around a dozen or so copy & paste operations each week. That's quite manageable, so I plan to do this every week as a service to the doper FF players. Look for updates every Tuesday night around midnight. (That's when I process the keeper league waiver claims.)

This chart shows the fantasy points allowed by each defense, split out by position. The charts should be pretty self-explanatory, but as a quick example, the data shows that Buffalo is super weak at defending against TEs for whatever reason.

WEEK 2 STATS

Quarterbacks    Running Backs   Wide Receivers  Tight Ends  
Det  28.43      Hou  48.01      Ten  46.78      Buf  26.65
Ten  27.55      Cle  40.43      Dal  42.70      Mia  22.80
TB   25.78      KC   33.52      TB   41.76      StL  18.80
Buf  24.70      Phi  33.04      Det  41.58      Ten  15.60
Dal  22.40      Ind  32.37      GB   41.35      Car  14.65
Mia  21.65      SD   29.89      Jac  36.35      NYG  14.35
Bal  21.43      Oak  29.80      NO   33.99      Det  13.75
StL  20.33      NYG  29.53      Bal  29.39      Min  12.55
Jac  19.55      Sea  29.41      Pit  28.04      Pit  12.35
Car  19.35      Buf  28.48      Chi  27.91      NE   11.80
Cin  17.60      Det  26.32      Cin  26.98      SD   11.40
Pit  17.40      Jac  26.16      Buf  26.47      Ari  11.20
Chi  17.08      Car  25.53      Oak  26.29      TB   10.70
NO   16.70      SF   24.83      Cle  26.00      Cin  10.65
GB   16.60      Dal  24.63      Phi  25.74      Dal  10.05
NYJ  16.27      Atl  23.29      Ari  25.42      Hou   9.68
Hou  15.80      Bal  23.27      Den  24.87      Bal   9.00
KC   15.55      StL  22.34      Car  24.63      NO    8.50
NE   15.33      Mia  22.00      Atl  24.47      Atl   8.00
Ari  15.03      TB   21.90      Hou  24.40      KC    7.95
Oak  14.98      NO   20.40      Was  23.93      Chi   7.80
SD   13.43      NE   19.89      SF   23.77      Oak   6.15
Cle  12.98      Was  17.41      Min  21.23      Cle   6.05
SF   12.95      Den  17.30      SD   20.97      Sea   6.00
Atl  12.60      Chi  16.62      StL  20.75      Jac   5.60
NYG  11.00      Min  16.52      KC   18.90      NYJ   5.40
Was  10.93      GB   15.65      Ind  18.41      Was   5.29
Min   8.93      Ari  15.40      Mia  16.12      Phi   5.25
Phi   8.73      Pit  12.88      NE   14.15      SF    3.80
Sea   6.93      NYJ  11.67      NYJ  13.61      GB    2.90
Ind   6.43      Cin  11.35      NYG  13.43      Ind   2.20
Den   5.60      Ten  11.04      Sea  13.36      Den   1.30

[Ellis Dee]

The above numbers show average fantasy scoring, but I capture all individual stats. eg: Passing yards, sacks, Rushing TDs, etc... That means I can calculate the fantasy points using whatever scoring system would make these numbers most useful. The above numbers use the scoring system from the All-Pro league, which is as follows:

Passing Yards 20 yards per point; 1 points at 200 yards; 1 points at 325 yards
Passing Touchdowns 4
Interceptions -2
Sacks -.4
Rushing Yards 10 yards per point; 1 points at 100 yards; 1 points at 175 yards
Rushing Touchdowns 6
Receptions .5
Reception Yards 10 yards per point; 1 points at 85 yards; 1 points at 150 yards
Reception Touchdowns 6
Return Yards 25 yards per point
Return Touchdowns 6
2-Point Conversions 2
Fumbles -1
Fumbles Lost -1
Offensive Fumble Return TD 6

What system should I use to make the numbers most useful for multiple leagues?

I plan to add a similar chart for kickers, as well as a reverse chart showing which offenses give up the most points to defenses. Hopefully by next week's games.

[Ellis Dee]

I would also like feedback on how to calculate averages. Right now it's just a simple average, which is fine for two weeks of data. But as we get further into the season, the early weeks will be less meaningful. So what is the best way to weight the averages?

[SenorBeef]

Sorry to tell you this after you put all this effort in, but fftoday.com actually does this under their stats section, in quite a bit of detail.

[Ellis Dee]

Sweet, thanks for the tip.

[VarlosZ]

That's very cool; I'll be especially interested to see which offenses give up the most points to fantasy defenses, info I've been pining after for a long time.

I would also like feedback on how to calculate averages. Right now it's just a simple average, which is fine for two weeks of data. But as we get further into the season, the early weeks will be less meaningful. So what is the best way to weight the averages?

FO uses certain ratios for their weighted DVOA stat that may (or may not) be helpful as a rough guide to when and to what extent old results are non-predictive. The old weights are given at the bottom of this page. I'll see about finding the current weights later.

(Ha, just got your PM after having looked up exactly the info you wound up requesting. )

[Munch]

Any update here?

[borschevsky]

ESPN has some similar stats, although they don't let you change the scoring system used.

[SenorBeef]

Originally Posted by Munch

Any update here?

I assume he isn't working on his own system since I linked to other sites that automate this.