Posted by dahsdebater on 4/11/2014 12:43:00 PM (view original):
On either scale; for most pitchers the scores are more similar. The aggregate historical WAR/IP is the same for non-Buehrle pitchers with a career 118 ERA+. And it's .019.
I think you made a mistake in your calculations. I took every pitcher with a career 118 ERA+ (excluding guys from the 1800's and early 1900's) and ran a bWAR and fWAR comparison.
The average bWAR per IP is 0.0166.
The average fWAR per IP is 0.0151.
Buehrle's bWAR per IP is 0.0191. His fWAR per IP is 0.0168.
His fangraphs WAR is "much closer" the the average WAR/IP of pitchers with the same ERA+ on both scales.