from Amazon
Tuesday, May 03, 2011
At-Counts
Peter’s chart for 2002-2010.
1. The “through count” is 100 times more useful than the “at count”. The at-count is saying “if you know the at bat ends on this pitch, what just happened”. It is so prone to misuse, and so limited in its good use, that you have to be extremely careful.
The through-count is saying “now that I’m in this count, what happens by the time my turn at bat ends”.
I’m glad Peter said he’ll have the better chart next week.
2. Remove all IBB. They are nothing but noise, and they cause problems. If you insist on keeping the IBB, then treat them like regular BB in wOBA.
3. Last point: it’s easier to follow if you sort based on hitter’s count to pitcher’s count. That means, in order:
3-0
3-1, 2-0
3-2, 2-1, 1-0
0-0, 1-1, 2-2
0-1, 1-2
0-2
UPDATE: Through-counts here.
The “through count” chart was published last night, actually. It’s linked in my name. I assume BtB’s RSS is behind again…
IBB weren’t used in calculating wOBA, but they were for OBA. If I could do it over I’d take IBB out of OBA as well. I’m just used to doing (H+BB+HBP)/(AB+BB+HBP+SF) that I didn’t even think about it. When I looked up the generic wOBA coefficients it explicitly says NIBB, which reminded me to remove the IBB:
http://www.insidethebook.com/woba.shtml