Thursday, September 25, 2008

True Player Values - Running Backs Revisited

Oops. I found a mistake in my TPV algorithm that did not account for the fact that the Ravens and Texans have played 1 fewer game than everyone else. The result was the the ratings for their defenses were artificially high, making the rating for all running backs that have played them artificially high. When I saw that the Ravens defensive ratings were very high, it did not surprise me, but when I saw the Texans defense rated very high, I realized that something was amiss. That has now been fixed.

So the previous running back rankings posted yesterday where flawed. Here are the (hopefully) correct ones:

Name Rush Ru Yards Ru TDs
Marion Barber 62 415 6.3
Jamal Lewis 44 352 0
Steve Slaton 31 348 1.8
Chris Perry 59 343 4.1
Ryan Grant 40 307 0
Clinton Portis 65 298 3.9
Steven Jackson 50 296 0
Willie Parker 66 294 0.8
Adrian Peterson 65 278 1.1
Frank Gore 60 268 3.6
Matt Forte 73 268 1.3
Michael Turner 59 261 2.7
Chris Johnson 50 242 0
Julius Jones 61 240 1.7
Marshawn Lynch 60 237 4.5
Darren McFadden 44 225 0.5
Jonathon Stewart 31 211 4.3
Ladanian Tomlinson 57 210 1.2
DeAngelo Williams 39 201 0
Brian Westbrook 42 201 2.7
Brandon Jacobs 50 199 1
Edgerin James 62 187 0
Joseph Addai 43 187 2.6
Fred Taylor 49 186 0
Selvin Young 26 182 1
Felix Jones 18 170 2.2
Earnest Graham 37 169 0.3
Thomas Jones 49 160 0.9
Reggie Bush 42 158 1.5
Le'Ron McClain 36 152 2.3

I don't think anyone should be surprised to see Barber at the top of this list, but the next four guys all warrant a closer look.

Lewis, Slayton, and Perry have all faced a combination of Dallas (54.6%), Pittsburgh (37.9%), Baltimore (40.2%), Tennessee (49.3%), and the Giants (60.4%), who happen to be 5 of the top 7 run defenses in the league. (The number in parens next to each team are their True Player Value defensive rating - it is the percentage of rush yards that the defense gives up compared to a league-average defense). So their mediocre-to-good performances against only great defenses have really increased their adjusted stats.

Over the next four games, Lewis faces Cincinnati (114%), the Giants (60.4%), Washington (111.3%), and Jacksonville (102.2 %). Now, I expect the Redskins and Jaguars defenses to improve some, but Lewis only has 1 defense in the class of what he started out against over his next four games. I really expect him to right the ship.

Steve Slaton, on the other hand, faces Jacksonville (102.2 %), Indianapolis (153.6%), Miami (122.1 %), and Detriot (144.7%) over the next four games. He should own the city of Houston by the time that stretch of games is over. If you read this blog before your draft, you already own Slaton. Otherwise, if there is any way you can get Slaton, pounce on him.

Chris Perry draws Cleveland (84.8%), Dallas (54.6%), the Jets (91.8%), and Pittsburgh (37.9%) over the next four games. He might be better than his real numbers to date, but his schedule aint getting any easier. Pass on Perry.

Ryan Grant is rated so high based on his 92 yards against Minnesota, which come out to 196 adjusted yards. In contrast, his 20 yards against Detriot equate to 14 yards adjusted. That is quite a bit of inconsistency, not one of the things we look for here at FFV. Anyway, his next four games are against Tampa Bay (103.3%), Atlanta (185.2%), Seattle (79.4%), and Indianapolis (153.6%). A few chumps on the schedule and getting healthier should equate to better numbers for Grant.

So, in summation, expect Lewis, Slaton, and Grant to put up improved numbers over the next few weeks, but expect Chris Perry to keep performing at about the same level.

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