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BJOL NFL Power Ratings - 09/23/08

September 23, 2008

      AFC

 

 

     NFC

 

Team

Rnk

 

Team

Rnk

Denver

112.7

 

Dallas

116.0

Tennessee

112.0

 

Philadelphia

111.4

Baltimore

109.2

 

Tampa Bay

110.3

San Diego

105.8

 

New Orleans

110.2

Pittsburgh

105.4

 

Chicago

108.9

Buffalo

104.7

 

Washington

108.7

Jacksonville

103.0

 

NY Giants

107.6

Cincinnati

101.3

 

Arizona

107.3

Indianapolis

99.4

 

Green Bay

105.3

Cleveland

96.2

 

Carolina

105.0

Oakland

93.9

 

Minnesota

103.2

Miami

91.2

 

San Francisco

96.1

Houston

90.7

 

Atlanta

95.8

NY Jets

85.9

 

Seattle

90.2

New England

80.5

 

Detroit

81.7

Kansas City

75.4

 

St. Louis

74.7

            Monday Night Football (San Diego 48, Jets 29) was fairly consistent with our predicted outcome, but moved the Jets forward by 3.9 points, while dropping San Diego by 2.9.   This didn’t move either team in the standings; San Diego remains fourth in the conference, the Jets remain 14th.  The AFC East teams—Miami, the Jets and New England—have been playing one another, so their ratings are kind of locked in place relative to one another, so the +3.9 for the Jets also moved the Pats and Dolphins up by 2.3.   The only change of positions in the AFC was that this moved Miami in front of Houston; otherwise the one-through-sixteen order remained the same.

            In the NFC, the Panthers lost 1.5 points because their win over San Diego was devalued a little bit, while Arizona, with a earlier win over Miami, moved up by 0.9.  This caused Carolina, in a tight pack of teams, to drop two slots behind Arizona and Green Bay. 

            There is no Thursday night game this week.   Our predictions for Sunday’s games:  

Atlanta at Carolina   Panthers by 11
Cleveland at Cincinnati      Bengals by 7
Houston at Jacksonville     Jags by 12
Denver at Kansas City      Broncos by 23
San Francisco at New Orleans   Saints by 13
Arizona at New York Jets     Arizona by 15
Green Bay at Tampa Bay   Buccaneers by 7
Minnesota at Tennessee    Titans by 11
San Diego at Oakland    Chargers by 10
Buffalo at St. Louis   Bills by 19
Washington at Dallas    Cowboys by 9
Philadelphia at Chicago   Philadelphia by 1

             Philadelphia by Chicago by actually less than one-half, actually; it’s even.   My gut instinct is that Chicago will win, because Chicago needs a win more and I usually think in a fairly even match, the team that needs the win worse will win.  

            I made up a rule there, based on no research whatsoever, that when a game was lop-sided I would reduce the predicted margin by dividing the points above 10 by two—thus, a 20-point difference becomes 15, a 24-point difference becomes 17.  I’m just really uncomfortable saying that the Broncos will beat Kansas City by 36, because they don’t need to do that.   Up 20 in the fourth quarter, they’ll just run off as much clock as they can and kick a field goal.

 
 

COMMENTS (9 Comments, most recent shown first)

birtelcom
Comparing to prevailing point spreads, the James model is predicting the favorties to beat the point spread in 9 of the 12 games (often by a quite substantial margin), the favorites to win by a smaller amount than the point spread in two cases (Cowboys by 9 compared to the 11 point spread, and Eagles by 1 compared to a spread of 3) in one game the James model picks an underdog (Arizona, visiting the Jets) to win outright.
11:39 AM Sep 27th
 
demedici
I wonder what one loss Trailbzr refers to...the horrible one to the Dolphins, or the loss of the one player the team couldn't really afford to lose....or the loss mentally of a volatile WR who no longer has a top 3 QB throwing the ball to him 6-7 times a game....or the collective loss of a step the team's already overrated defense (buoyed by teams needing to come from so far behind early last year) seems to have suffered...or the disheartening loss that happened sometime between last season's regular season finale and this season...or the loss of an admittedly average RB and average TE for a couple of games.

I don't think that the Patriots are a terrible team. They're not 40 points worse than last season. But their three games this season have shown them to be a very flawed team, and one that isn't in the same league as last year's team. That's largely what the system was meant to determine, and currently the findings seem to line up with what viewing the games suggests.

Still, I think everyone should probably give it more than 3 games to really dig into the results.
10:34 AM Sep 25th
 
Trailbzr
The Patriots outscored their opponents by 315 points last year.
One loss can hardly imply they've declined by 40 points a game.
6:11 AM Sep 25th
 
bjames
1) It seems to me that it is more interesting to ask the question “What do this season’s games tell us about the quality of the teams”, rather than hedge your bets (like everybody else is doing) by riding on last season. I agree it is speculative, and it may well prove to be wrong. But I’d rather be wrong than just chirp along with everybody else.

2) The Patriots, Jets and Dolphins have each played three games, and in each case two of those three games are against one another. They’re all 1-1 against each other. That leaves those three teams kind of locked in one vs. another, but with only three games to place them in relation to the rest of the league. All three of those games look bad. The Patriots barely beat Kansas City, at home. The Dolphins were routed in Arizona. The Jets were beaten by 19 in San Diego. There’s no game there that sticks up for the quality of the group.

3) But as Trailbizarre points out, with perhaps undue harshness, this is really not enough to reach a conclusion, it’s very speculative, and it seems unlikely to hold up for the duration. But if it does, I want full credit for being the only guy who had the stones to say the Patriots sucked after they started out 2-1.

4) It is certainly true that I don’t know crap about football.

5) The Giants beat Washington by 9 points at home, not really a massive domination. Their “output scores” are 111.6, for beating Washington by 9, 106.1, for thrashing St. Louis, and 104.9, for beating the Bengals in overtime. Washington’s scores are 104.6, for the loss to the Giants, 111.0, for beating New Orleans, and 110.5, for beating Arizona. So Washington (or, as the politicians call it, Warshington) is 7 points behind for a 9-point loss on the road, but +4.9 in the second week and +5.6 in the third.

6) I don’t write about gambling.

7) I doubt that NFL games, in the long run, will be closer than the system predicts. But that may be true early in the season. As the season goes on, the random up-and-down performance lines of teams will tend to push the teams toward the center, reducing the margins. Early in the season, I would suspect that our margins will be too large. I’ll try to remember to check.

12:32 AM Sep 25th
 
Zeth
If you went with this system in placing your theoretical bets, you would be betting on the favorite and ignoring the points in nearly every single game. NFL games are closer than this system predicts them to be.

That said, it's a fascinating system, and intuitively I suspect it may well prove more accurate than any human in predicting, week to week, the outcomes of games straight-up. I'll be interested to see how well it does later in the season, after we have some more data.
9:40 PM Sep 24th
 
beta461
Starting with the supposition that gambling is legal; how does your method stack up against Vegas lines?
6:33 PM Sep 24th
 
OBM
I like it, tho I'm wondering how the Giants can end up below the 'skins, a team they dominated in week one.
10:57 PM Sep 23rd
 
800redsox9
You guys don't know crap about football. Chicago will easily beat the Eagles.
10:42 PM Sep 23rd
 
Trailbzr
So the Patriots are 20 points worse than an average team (80.5) because going 16-0 last season is completely irrelevant for this season?
At the end of this year, the Pats 80.5 might be reasoned away by saying "well they lost a really bad game, but their rating only lasted a short time." But until then, I suggest calculating a rating for last season; then weighting that rating by (8 - this year's games) until everyone has played 8 games; then you can use this year's rating exclusively.

7:26 PM Sep 23rd
 
 
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