Quote:
Originally Posted by X3NEIZE
KK/BB does not always translate in runs.... CERA is influenced by a ton of other factors, like bad defense.... good framing helps improve pitcher K's and BB...
So like i said, CERA is not the best indicator of the patch fix... period. You'll figure it out.
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There's no denying though that less BBs = less baserunners = less runs, and more Ks = more outs = less runs. There's a very strong correlation between CERA and BBs and Ks.
And the possible confounding factors you're bringing up are accounted for in many people's tests as they use the same team - same defense and same pitchers, same park.
I don't think anyone cares what the exact CERAs are, or at least I don't, what I am looking at is the difference/delta in CERAs between the good defensive catcher and the bad one.