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jAZ 01-04-2010 02:47 AM

YAC
 
I noticed how important yards/attempt was in calculating the QB rating. I was curious how the Chiefs stacked up to the NE and AZ offenses in YAC during 2009. I couldn't get a game/game figure for players, so I counted all of Longs and Chambers yards to as well as LJ's. That's probably an inflated number by maybe 50 yards, so I've rounded accordingly.

KC, 1100 YAC

NE, 1900 YAC
AZ, 1450 YAC

Other noteable teams...

DAL, 1700 YAC
DEN, 1550 YAC
DET, 1450 YAC
GNB, 1700 YAC
HOU, 1700 YAC
IND, 1700 YAC
MIN, 1700 YAC
NOR, 1900 YAC
SEA, 1550 YAC
SDG, 1650 YAC

Our top 5 guys in 2009:

Code:

Jamaal Charles, RB        KAN        204
Chris Chambers, WR        KAN        153
Dwayne Bowe,  WR        KAN        146
Bobby Wade,  WR        KAN        103
Mark Bradley,  WR        KAN        95

Charles was #68, Chambers was #112, Bowe was #119.


Our to 5 guys in 2008:
Code:

Dwayne Bowe,  WR        KAN        386
Jamaal Charles, RB        KAN        309
Tony Gonzalez, TE        KAN        258
Larry Johnson,  RB        KAN        109
Devard Darling,  WR        KAN        107

Bowe was #22 in the league, Charles was #44, Gonzo was #62.

So we had 3 players in 2008 who were MUCH better at YAC in 2008 than any player in 2009.

Why is that? Bowe's numbers are down somewhat because of his 4 games suspension. But Charles played much more, though probably less as a pass catching back?

jAZ 01-04-2010 02:59 AM

And for the record, 2007 Chiefs:

Code:

Dwayne Bowe,  WR        KAN        354
Tony Gonzalez, TE        KAN        297
Larry Johnson,  RB        KAN        254
Kolby Smith,    RB        KAN  155
Michael Bennett, RB        KAN        119

So the drop isn't just a product of the "Pistol" of 2008. It's different than past seasons and we are *bad* at it this year.

jjjayb 01-04-2010 07:11 AM

Because our QB doesn't hit guys in stride? His innaccuracy causes them to come back to the ball, dive for the ball etc..

jspchief 01-04-2010 07:35 AM

I remember Bowe in his rookie year was always instantly turning upfield with his receptions. In fact, he reminded me a lot of Terrel Owens in the way he tried to turn every catch into something more.

Now It's all he can do just to hang on to the damn ball. What the hell happened?

jAZ 01-04-2010 10:07 AM

Quote:

Originally Posted by jjjayb (Post 6407493)
Because our QB doesn't hit guys in stride? His innaccuracy causes them to come back to the ball, dive for the ball etc..

Maybe, but that seems more complicated than you might assume.

New England's YAC in 2008 vs 2009

2008 with Cassel, 2100 YAC
2009 with Brady, 1900 YAC

2009 with Cassel, 1100 YAC

Cassel was able to deliver the ball well enough in 2008 to get 1000 more yards off of YAC alone than KC in 2009.

That's amazing.

JohninGpt 01-04-2010 10:42 AM

YAK
 
http://www.rarebreeds.co.nz/yak.jpg

HonestChieffan 01-04-2010 10:46 AM

Our guys must need to run further after they catch it.

Wait...our guys generally dont catch it.

patteeu 01-04-2010 10:46 AM

Are you talking about "yards after catch" or "yards/attempt"? Your OP confused me.

siberian khatru 01-04-2010 10:53 AM

Quote:

Originally Posted by patteeu (Post 6407887)
Are you talking about "yards after catch" or "yards/attempt"? Your OP confused me.

Christ, you two, take it to the DC Forum.









:p


Isn't jAZ and Patteeu talking football a sign of the Apocalypse?

jAZ 01-04-2010 12:09 PM

Quote:

Originally Posted by patteeu (Post 6407887)
Are you talking about "yards after catch" or "yards/attempt"? Your OP confused me.

Mostly YAC.

It started with looking at Cassel's QB rating, and realizing that a big part of the formula for QB Rating is based upon a QB's yards per attempt. It occured to me how worthless that portion of the formula can be (at least to an extent) given that a big portion of a QB's yardage number is generated by YAC. In fact, certain offensive systems are designed to be productive based largely on YAC. If the WR's are ineffecitve at generating YAC, it can have a substantial impact on the QB rating.

Cassel circa 2008 benefied from 2100 YAC at NE. Only 1100 with KC.

Same QB, different weapons.

Those 1000 yards of YAC difference are worth almost 10 points of difference in Cassel's QB rating (69.9 vs 78.4).

If Bowe plays all 4 games and somehow our WR's get just the YAC output we had in 2007 or 2008 (about 300 more yards), Cassel's QB rating goes up to about the same level.

jjjayb 01-04-2010 12:19 PM

Cassel is what he is. He's an average QB. You shouldn't have to tweak numbers to make him look better.

Quote:

Originally Posted by jAZ (Post 6408134)
Mostly YAC.

It started with looking at Cassel's QB rating, and realizing that a big part of the formula for QB Rating is based upon a QB's yards per attempt. It occured to me how worthless that portion of the formula can be (at least to an extent) given that a big portion of a QB's yardage number is generated by YAC. In fact, certain offensive systems are designed to be productive based largely on YAC. If the WR's are ineffecitve at generating YAC, it can have a substantial impact on the QB rating.

Cassel circa 2008 benefied from 2100 YAC at NE. Only 1100 with KC.

Same QB, different weapons.

Those 1000 yards of YAC difference are worth almost 10 points of difference in Cassel's QB rating (69.9 vs 78.4).

If Bowe plays all 4 games and somehow our WR's get just the YAC output we had in 2007 or 2008 (about 300 more yards), Cassel's QB rating goes up to about the same level.

Part of the problem with our YAC is that Bowe missed games and he's a normally a major producer. But that's only 25% decline, his was over 50%.


jAZ 01-04-2010 12:29 PM

So I just recalc'ed the QB ratings and resorted the list after taking out each teams YAC from the QB's calculation. It's not perfect, as some QBs' didn't play the whole season, and I'm taking out a whole season of YAC from their yardage (see Vince Young), but suprisingly the order of the list didn't change that much.


Code:

W/O YAC        W/ YAC                Player
1        2                Brett Favre
2        1                Drew Brees
3        4                Aaron Rodgers
4        3                Philip Rivers
5        5                Ben Roethlisberger
6        6                Peyton Manning
7        7                Matt Schaub
8        8                Tony Romo
9        9                Tom Brady
10        10                Kurt Warner
11        11                Eli Manning
12        12                Donovan McNabb
13        16                Carson Palmer
14        13                Joe Flacco
15        14                Kyle "Pro Bowl" Orton
16        17                David Garrard
17        15                Jason Campbell
18        20                Matt Ryan
19        19                Alex Smith
20        21                Jay Cutler
21        22                Chad Henne
22        18                Vince Young
23        23                Matt Hasselbeck
24        25                Matt Cassel
25        27                Brady Quinn
26        28                Mark Sanchez
27        26                Ryan Fitzpatrick
28        30                Josh Freeman
29        24                Marc Bulger
30        31                Jake Delhomme
31        29                Matthew Stafford
32        32                JaMarcus Russell


FAX 01-04-2010 12:32 PM

Our passing game looks a whole lot like 5 club-footed monkeys in a hot potato scrum.

It's an interesting statistic, to be sure, Mr. jAZ. We once proved beyond a shadow of a doubt that Yards Per Attempt (a related stat) has a significant impact on win/loss records. My guess is that YAC is dependent upon A) Proper route running, B) Ability of WR to gain separation, C) Ball placement, and D) Desire ... not necessarily in that order.

Since we are struggling in practically every one of those categories, it makes sense that our overall YAC is low.

FAX


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