Team OPS Differentials

We are just about at the half way point. In the table below the next to last column, Pred Pct, is based on the equation of

Pct = 1.326*OPSDIFF + .5

That came from a regression of all teams from 2010-14. OPSA it the OPS allowed by the team's pitchers. The teams are ranked by OPSDIFF and the last column is the difference between their actual Pct and their Pred Pct. The 25th highest OPSDIFF since 1914 is .109, so the Dodgers are not too far behind that. The Phillies, with -.125, would have the 20th worst ever.

TEAM	Pct	OPS	OPSA	OPSDIFF	Pred Pct	Diff
LA Dodgers	0.561	0.762	0.659	0.103	0.637	-0.076
Houston	0.578	0.735	0.671	0.064	0.585	-0.007
St. Louis	0.650	0.719	0.656	0.063	0.584	0.066
Oakland	0.452	0.719	0.658	0.061	0.581	-0.128
Pittsburgh	0.575	0.699	0.650	0.049	0.565	0.010
Toronto	0.506	0.780	0.732	0.048	0.564	-0.058
Washington	0.556	0.729	0.683	0.046	0.561	-0.005
Kansas City	0.577	0.719	0.679	0.040	0.553	0.024
NY Yankees	0.543	0.751	0.718	0.033	0.544	-0.001
San Francisco	0.512	0.734	0.710	0.024	0.532	-0.020
Chicago Cubs	0.544	0.698	0.676	0.022	0.529	0.015
LA Angels	0.531	0.696	0.675	0.021	0.528	0.003
Baltimore	0.519	0.733	0.713	0.020	0.527	-0.008
Tampa Bay	0.506	0.681	0.665	0.016	0.521	-0.015
Detroit	0.513	0.760	0.747	0.013	0.517	-0.005
Cleveland	0.475	0.711	0.704	0.007	0.509	-0.034
Cincinnati	0.456	0.719	0.717	0.002	0.503	-0.047
Miami	0.427	0.686	0.703	-0.017	0.477	-0.051
Arizona	0.494	0.726	0.743	-0.017	0.477	0.016
Seattle	0.457	0.666	0.688	-0.022	0.471	-0.014
NY Mets	0.500	0.652	0.674	-0.022	0.471	0.029
Boston	0.458	0.721	0.746	-0.025	0.467	-0.009
Texas	0.500	0.712	0.738	-0.026	0.466	0.034
Minnesota	0.531	0.693	0.738	-0.045	0.440	0.091
Atlanta	0.494	0.684	0.732	-0.048	0.436	0.057
Milwaukee	0.422	0.692	0.750	-0.058	0.423	-0.001
Colorado	0.420	0.740	0.800	-0.060	0.420	-0.001
San Diego	0.470	0.669	0.742	-0.073	0.403	0.067
Chicago Sox	0.462	0.655	0.743	-0.088	0.383	0.078
Philadelphia	0.325	0.658	0.783	-0.125	0.334	-0.009

Click here to see Fangraphs site which shows winning percentage based on BaseRuns. The correlation between the win pct predicted by the OPS differential and the win pct predicted by BaseRuns is .99