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KCFan95
10-04-2000, 09:39 AM
Did I hear something correct last night?

Supposedly, Kurt Warner's game against the Chargers produced a QB rating of something like 158.3. This was the ninth time in NFL history that a QB had done this in a game. His statistics were something like 24 for 30 for 390 yards, 4 TDs, and no INTs.

My question is... if this produced 158.3, wouldn't 25 for 30 be better? I know the rating system has tables and formulas but this is just common sense. He could have done better, n'est-ce pas? http://www.ChiefsPlanet.com/ubb/confused.gif

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Frodo lives!!

Go Chiefs!!

[This message has been edited by kcbob (edited 10-04-2000).]

[This message has been edited by kcbob (edited 10-04-2000).]

Devin Vierth
10-04-2000, 09:40 AM
kcbob,

I think the way the formula is, 158.3 is the max the rating can be.



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bk

Brock
10-04-2000, 09:43 AM
kcbob,
I'm not 100% sure, but I believe in the rating systme 158.3 is as high as the rating goes. It is not an unlimited measuring system.

Dev
~working with a limited memory device...

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GO CHIEFS!!!!
Time to eat Seachicken!!

Yosef_Malkovitch
10-04-2000, 09:45 AM
I'm not certain what the formula criteria are and I certainly don't understand the whole thing. However, upon it's creation, it was believed that NO QB is going to connect on 100% of his passes so they set the "perfection" bar a little lower. Kinda like grading on a curve.

KCFan95
10-04-2000, 09:51 AM
Idiot double post! http://www.ChiefsPlanet.com/ubb/redface.gif http://www.ChiefsPlanet.com/ubb/redface.gif
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Frodo lives!!

Go Chiefs!!

[This message has been edited by kcbob (edited 10-04-2000).]

KCFan95
10-04-2000, 09:52 AM
Well I think it's fairly obvious that the maximum rating is 158.3. Maybe I should restate my question and ask "Why is there a max in the first place?"

Then again, I could see a max if it was something like 100. A batting average max is 1.000. I understand that. But 158.3???? I'd like the drugs they were doing when they came up with that. http://www.ChiefsPlanet.com/ubb/wink.gif

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Frodo lives!!

Go Chiefs!!

Devin Vierth
10-04-2000, 09:57 AM
Is everyone ready to attend QB rating 101??

The QB rating is broken down into 4 factors:

Factor 1:
(pass completions / Pass Attempts) / .2

Factor 2:
(yards / Pass Attempts) / 4

Factor 3:
(touchdowns / Pass Attempts) / .05

Factor 4:
(.95 - (interceptions / Pass Attempts)) / .04

((Fact1 + Fact2 + Fact3 + Fact4) * 100) / 6 = qbrating

There will be a test! http://www.ChiefsPlanet.com/ubb/smile.gif




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bk

htismaqe
10-04-2000, 09:58 AM
The system is designed to grade a QB's effectiveness over the course of the season, rather than rate his performance for a single game. Thus, while a QB might complete 95% of his passes in one game, it is highly unlikely that one would complete that percentage over a season. (The season record is 70.55%.)

Same for interceptions. To attain the highest possible score on that component, a QB would have to have no interceptions for the season. (Not going to happen.)

The average yards/pass perfect score requires an average of 12.5 yards/completion. The NFL record is 11.17 and has stood since 1957.<P>

htismaqe
10-04-2000, 10:01 AM
And to obtain the maximum possible score on touchdowns/pass requires that he throw a touchdown 11.9% of the time. The record of 13.9% has stood since 1943.

htismaqe
10-04-2000, 10:14 AM
And not to pick nits, but the formula for completion percentage is:

((100(comp/att))-30)*.05=x

*note:if x is less than 0, x=0, if result is
more than 2.375, x=2.375

Yards gained per attempt:

((yds/att)-3)*.25=y

*note:same as above note

Percentage of TD passes:

((TD/att)*100)*.2=z

*note: 2.375 maximum value for z

Percentage of INT:

2.375-(((INT/att)*100)*.25)=a

*note:if a is less than 0, a=0

To calculate total QB rating:

((x+y+z+a)/6)*100=QB Rating<P>

Romel
10-04-2000, 10:48 AM
2000 NFL QBs with 100+ Attempts, ranked by "Air-yards" per attempt,
where "Air-yards"=yards_passing minus yards_after_catch.

AIRPC is "Air-yards" per completion
AIRFRAC is "Air-yards"/yards_passing
YPA is yards_passing per attempt, the component used in the QB rating.

OBS AIRPA AIRPC YPA ATT COMP Y YAC AIRFRAC NAME

_1 7.4 10.3 11.8 165 119 1947 721.0 63% Kurt Warner
_2 6.2 10.0 _8.5 117 _72 _991 270.0 73% Daunte Culpepper
_3 5.9 _9.7 _8.1 112 _69 _903 237.0 74% Rob Johnson
_4 5.7 10.0 _7.3 151 _86 1097 233.0 79% Elvis Grbac
_5 5.5 _8.7 _8.0 143 _91 1149 356.0 69% Brian Griese
_6 5.4 _8.2 _8.9 143 _94 1267 496.0 61% Peyton Manning
_7 5.2 _8.2 _7.7 124 _79 _949 304.0 68% Steve Beuerlein
_8 5.0 _8.5 _6.7 184 108 1229 316.0 74% Mark Brunell
_9 4.8 _7.6 _7.1 153 _97 1079 343.0 68% Tim Couch
10 4.7 _8.1 _6.7 181 105 1220 374.0 69% Brett Favre

[This message has been edited by DanT (edited 10-04-2000).]

[This message has been edited by DanT (edited 10-04-2000).]

Romel
10-04-2000, 10:54 AM
11 4.6 8.0 6.3 157 _91 _989 260.0 74% Jake Plummer
12 4.6 8.3 6.7 116 _64 _777 249.0 68% Jay Fiedler
13 4.5 7.6 6.2 148 _87 _917 253.0 72% Charlie Batch
14 4.4 7.3 6.5 161 _97 1052 342.0 67% Cade McNown
15 4.3 8.0 6.5 149 _81 _972 324.0 67% Chris Chandler
16 4.3 8.7 6.7 132 _66 _882 309.0 65% Shaun King
17 4.2 6.4 7.1 172 112 1216 501.0 59% Brad Johnson
18 4.1 6.6 7.5 149 _94 1122 506.0 55% Jeff Garcia
19 4.1 6.8 6.0 177 106 1067 343.0 68% Drew Bledsoe
20 3.9 6.5 6.3 167 100 1050 401.0 62% Kerry Collins
21 3.8 6.3 7.1 101 _62 _721 333.0 54% Rich Gannon
22 3.8 6.4 5.9 168 100 _995 360.0 64% Donovan McNabb
23 3.6 5.9 6.7 124 _76 _828 381.0 54% Jon Kitna
24 3.6 7.2 5.9 155 _77 _911 356.0 61% Vinny Testaverde
25 3.5 6.9 5.2 102 _51 _529 175.0 67% Ryan Leaf
26 3.4 7.6 5.0 123 _54 _619 206.0 67% Akili Smith
27 3.2 5.7 5.9 173 _98 1015 460.0 55% Tony Banks
28 2.6 4.3 5.3 143 _84 _755 390.0 48% Jeff Blake

ddpatterson
10-04-2000, 11:01 AM
Thanks guys, my head hurts now, and my screen just got blurry. My eyes lost the ability to focus.
I just fell down and can't get up.

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Red Eyes
Chinn Up.

[b]The SitCom must die!!</B>

Romel
10-04-2000, 11:02 AM
It's interesting to me that, though Warner's receivers give him lots of yards after the catch, he also leads the league in air_yards per attempt. Also, note that Grbac has gotten a higher percentage of his passing yards through the air than anyone in the league. His AIRFRAC is 79%, which means only 21% of his yards have come after the catch. Compare this to Gannon, say, whose AIRFRAC of 54% means that 46% of his passing yards have come from his receivers after the catch, more than twice as big a share as Grbac's receivers have given him.

htismaqe
10-04-2000, 11:03 AM
Good, milkman. We've been in sore need of a replacement since Mrs. Miller passed.

htismaqe
10-04-2000, 11:05 AM
Great Dan...just provide the opening for one of our you-know-whats to say something like:

"That just illustrates that Grbackup can't hit a receiver in-stride and allow them to keep running. They're having to dive for bad passes."

Romel
10-04-2000, 11:17 AM
Robert_Dole,

LOL! Well, at least they'd be basing an argument on something halfway measurable, for once! http://www.ChiefsPlanet.com/ubb/wink.gif

Warrior5
10-04-2000, 12:10 PM
Is there a website that gives week by week QB ratings? I was wondering what Elvis got last Mon night. Thanks. I see his season rating is up over 95 http://www.ChiefsPlanet.com/ubb/biggrin.gif

[This message has been edited by Cormac (edited 10-04-2000).]

Romel
10-04-2000, 12:13 PM
If you're just interested in the week-by-week performance of a single player, sportsline.com has that. When you get to the player page for the guy you're interested in, click on the "Game Log".

KCFan95
10-04-2000, 12:18 PM
But, bkkcoh, if your formulas are correct, where are the "tables"? And if it is strictly formulas, there should be no maximum. Or am I missing something?

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Frodo lives!!

Go Chiefs!!

Cannibal
10-04-2000, 12:31 PM
I think that is a big reason Grbac's rating isn't higher than it is despite 12 TD's vs 4 INT's which is one of the best ratios in the league at this point. The downfield attack results in a lot of incompletions (and the 9 drops week 1 didn't help either) and thus if you have a lower completion percentage, you have a lower yards per attempt, and both pull your rating down. This is a major reason why the short passing offenses of the West Coast offense give QB's higher ratings, because they throw short quick passes and let the recievers work after the catch, which improves completion % and thus yards per attempt...

Devin Vierth
10-04-2000, 12:35 PM
Mr. Dole:

I used the stats for EG the last 3 games and got a qb rating of 105.2. This is close to the 105.4 that is listed on the Kchiefs.com site.

If one of the components of my rating is as far off as you say it is, how could I be within .2 of being correct. I figured this is just off because of rounding inconsistencies.[sp]


kcbob, check out post #9 as far as the limits the factors can be.




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bk

KCFan95
10-04-2000, 12:59 PM
So what's with these mythical "tables"? Now it sounds like it's all a straight-forward(?) formula.

Thanks, all.

htismaqe
10-04-2000, 01:26 PM
bkkcoh:

Bob Dole doesn't find where Bob Dole stated you were "far off." If your formula produces results within 99.81% of the NFL's convoluted calculation process, Bob Dole would vote for it without reservation.

Bob Dole was simply pointing out that is not the "Official" method of calculation.

(Bob Dole thinks maybe you were directing your comment to someone else...)

htismaqe
10-04-2000, 01:30 PM
kcbob:

Bob Dole can't figure out what you're talking about with the "tables" comments. It's pretty easy to create a spreadsheet that allows you to enter the QB stats and spits out the results, and there are Java and Flash based calculators floating around on the web.

Bob Dole likes <a href="http://www.brucey.net/nflab/media/rating.html">this one</a>.<P>

Romel
10-04-2000, 01:37 PM
I use this one:
http://www.primecomputing.com/javaqbr.htm

I've never seen it produce a discrepancy with the ratings found on the reputable sports sites on the web (e.g. cnnsi.com, sportsline.com, etc.). The only bad thing about it is that, if you mistakenly switch ATTEMPTS and COMPLETIONS, it won't catch your mistake and ask you to reenter. Instead, it'll compute an incorrect rating. Obviously, ATTEMPTS should be at least as big a number as COMPLETIONS.

Devin Vierth
10-04-2000, 01:45 PM
Kcbob,

Here is the link to some of the information Mr. Dole was giving out.
http://www.nfl.com/news/981202qbrate.html



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bk