J-Pav wrote:This thread moves along its course depending on who’s posting and how they’re feeling that day. I did not open this thread to reignite the black box discussions, however, I can see how we keep coming back to that. I opened this up to discuss one very simple observation:
Why does the expected win rate (pythag) no longer match up with my run differential, like, ever?
There was a time when the 365 pythag matched MLB pythag, in the sense that it fell largely within +/- 3, but more importantly there was a bell curve around that +/- . In other words, my +200 run diff would amount to 100 wins (or whatever it is), but my actual wins could be 105.
That is no longer the case. After 14 pages, I guess because we can’t figure out what might be happening, the conversation creeps back to the black box stuff because there’s nothing left to point to or talk about.
In another thread, a manager posted how the double play information doesn’t align correctly. I also posted an example of league runs scored not matching league runs allowed. I don’t think any of this is nefarious, but it does beg the question of what else might be functioning incorrectly.
A few words on anecdotal evidence too. Posting actually occurring examples is not “anecdotal”. You could argue that it’s well chosen, or not statistically significant, or whatever. But it is REAL evidence. Saying, “well, I ran the numbers and everything is fine” is the anecdotal argument.
Yes,
You are right...
the discussion comes back to 'black box' bc its the explanation for why things are 'weird' statistically.
Its underlying all the questions of why you can get a team of lefty killers struggling against lefty pitchers for example.
Pythag is another one of similar stuff-
Ive seen teams with minus 50 runs have a better record than a team with plus 150 - (thats a 200 run difference)
Have seen the team with the best differential miss the playoffs multiple times.