here are my DIPS calculations, (described here)

i adjusted the numbers for the hitting/fielding environment of the year (aka the BA and SLG on each type of BIP)

tell me if anything seems weird/wrong with my method and/or results

PWAR = Peripheral Wins Above Replacement  

Name       xERA   PWAR
Roy Halladay   3.31   7.19
CC Sabathia   3.48   6.98
Brandon Webb   3.24   6.93
Tim Lincecum   3.41   6.46
Ervin Santana   3.42   6.25
Dan Haren         3.44   6.12
James Shields   3.46   6.09
Cliff Lee         3.59   5.91
Derek Lowe   3.44   5.89
A.J. Burnett   3.65   5.87
Ricky Nolasco   3.54   5.76
Randy Johnson   3.48   5.27
Zack Greinke   3.71   5.23
Javier Vazquez   3.81   5.18
Cole Hamels   3.95   4.99
Roy Oswalt   3.83   4.95
Chad Billingsley   3.81   4.91
Johan Santana   4.07   4.88
Ben Sheets   3.79   4.81
Andy Pettitte   3.99   4.70
Mike Mussina   3.93   4.61
Felix Hernandez   3.96   4.60
Andy Sonnansti   3.92   4.58
Mark Buehrle   4.14   4.57
Ryan Dempster   3.97   4.55
Edinson Volquez   3.92   4.52
Paul Maholm   4.14   4.21
Josh Beckett   3.86   4.12
Brett Myers   4.11   4.04
Joe Saunders   4.18   3.94
Ubaldo Jimenez   4.22   3.94
Ted Lilly         4.28   3.85
Jake Peavy   3.96   3.84
Gil Meche         4.39   3.74
John Danks   4.26   3.70
Jon Lester         4.39   3.69
John Lackey   3.96   3.69
Justin Verlander   4.37   3.68
Armando Galar   4.16   3.57
Hiroki Kuroda   4.23   3.53
Gavin Floyd   4.47   3.45
Scott Baker   4.20   3.40
Braden Looper   4.46   3.39
Aaron Harang   4.39   3.38
Tim Wakefield   4.29   3.38
David Bush   4.33   3.33
Jeremy Guthrie   4.40   3.32
Matt Garza         4.36   3.31
Carlos Zambra 4.40   3.30
Johnny Cueto   4.35   3.26
Jered Weaver   4.36   3.22
Greg Maddux   4.49   3.18
Aaron Cook   4.65   3.16
Jesse Litsch   4.38   3.12
Bronson Arroyo   4.62   3.11
Randy Wolf   4.62   2.93
Vicente Padilla   4.51   2.89
Jair Jurrjens   4.61   2.88
Manny Parra   4.48   2.88
John Lannan   4.58   2.83
Kyle Lohse         4.74   2.77
Todd Welleme   4.67   2.76
Matt Cain         4.89   2.68
Nick Blackburn   4.77   2.67
Daisuke Matsus   4.54   2.66
Nate Robertson   4.69   2.62
Jamie Moyer   4.81   2.57
Mike Pelfrey   4.90   2.44
Tim Redding   4.83   2.40
Joe Blanton   4.98   2.26
Zach Duke         4.94   2.24
Oliver Perez   5.03   2.08
Scott Olsen   5.14   1.92
Kevin Millwood   5.03   1.92
Brandon Backe   5.06   1.85
Brian Bannister   5.12   1.85
Dana Eveland   5.14   1.62
Jon Garland   5.29   1.61
Jason Marquis   5.19   1.51
Paul Byrd         5.26   1.49
Edwin Jackson   5.36   1.36
Livan Hernande   5.40   1.31
Daniel Cabrera   5.49   1.07
Gregory Smith   5.57   0.93
Ian Snell         5.64   0.73
Kenny Rogers   5.68   0.69
Jeff Suppan   5.73   0.60
Barry Zito         6.07   -0.06