Bendix's Insanely Good xBABIP Piece
Now for him to spill the beans on it.
11 months ago
R.J. Anderson
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Awesome. I posted a link at McC as well.
When I was a kid I used to pray every night for a new bicycle. Then I realized God doesn’t work that way, so I stole one and prayed for forgiveness. - Emo Philips
Neglectful father of David Quinowski
by marcello on Dec 2, 2008 2:11 PM EST reply actions 0 recs
This is great stuff
Just to clarify one thing that is a bit unclear: Is it the case that hitting large numbers of grounders increases BABIP and large numbers of flies decreases BABIP?
It makes sense, I’m just not sure I’m reading the description of the variable correctly.
Your 2008 Athletics: It's Nothing Personal.
by PaulThomas on Dec 2, 2008 2:26 PM EST reply actions 0 recs
That's correct.
That actually follows from what we already know about pitchers and BABIP: namely, that fly ball pitchers tend to have lower BABIP than ground ball pitchers.
by Peter Bendix on Dec 2, 2008 4:44 PM EST up reply actions 0 recs
Why does this whiff on Jason Bay so consistently?
by oldjacket on Dec 2, 2008 2:46 PM EST reply actions 0 recs
That's an interesting question.
As I see it, there are two possible explanations:
1) Jason Bay does something else that we didn’t account for, or
2) Bay has simply rather consistently lucky. That’s not as silly as it sounds: sure, the odds of one player consistently exceeding expectations due to luck are remote, but the odds of it happening to someone are much higher. Why not Bay?
by Peter Bendix on Dec 2, 2008 4:45 PM EST up reply actions 0 recs
There are a few others, but I’m not sure how many would constitute more than would be expected. It misses pretty consistently on Jason Giambi, and theidea that immediately leaps reason is that the speed score you are using may not be sensitive enough at the bottom of it’s scale to correctly gauge how slow that slow-ass bastard is. He may be even slower than the typical player who doesn’t hit triples, steal bases or catch balls hit near him.
by oldjacket on Dec 2, 2008 10:04 PM EST up reply actions 0 recs
that should read “the idea that immediately leaps to mind”
typing in class. peh.
by oldjacket on Dec 2, 2008 10:05 PM EST up reply actions 0 recs
Well, check out other players who are insanely slow as well
Suggestions: Pat Burrell, anyone named “Molina”.
Your 2008 Athletics: It's Nothing Personal.
by PaulThomas on Dec 3, 2008 2:53 AM EST up reply actions 0 recs
For Giambi, what about his penchant to pull the ball every time?
Is that accounted for enough by the spray-chart variable? How about others who see extreme shifts: Ortiz, _?
Beyond the Boxscore // Calling BJ Upton lazy is lazy.
by Sky Kalkman on Dec 3, 2008 10:28 AM EST up reply actions 0 recs
Thanks, Graham.
That means even more coming from you, who re-defined what “astonishingly good work” meant when you created Stat Corner.
by Peter Bendix on Dec 2, 2008 4:47 PM EST up reply actions 0 recs
So then...
How can we use this to make better projections? I guess someone (not me) would have to regress each of the different components and then plug them into the formula? Something sort of like tRA* but for hitting? Graham?
by Nick J on Dec 2, 2008 6:13 PM EST reply actions 0 recs
We're kinda working on it. It's really freaking hard.
by Graham on Dec 3, 2008 10:21 AM EST up reply actions 0 recs
Good to know you're on the case
Take your time, we can wait…
by Nick J on Dec 3, 2008 2:55 PM EST up reply actions 0 recs
What I'd like to see is this Bendix/Dutton study, but for pitchers.
Can we pick out which pitchers will have better/worse BABIP skills based on other factors?
Beyond the Boxscore // Calling BJ Upton lazy is lazy.
by Sky Kalkman on Dec 3, 2008 2:45 PM EST up reply actions 0 recs
Nice job!
Very impressive work.
Of course the whole college student thing explains why you have so much time to write :)
by Dan Turkenkopf on Dec 2, 2008 8:28 PM EST reply actions 0 recs
Hey, I'm a working stiff now!
I graduated last May.
by Peter Bendix on Dec 3, 2008 3:57 PM EST up reply actions 0 recs
Congrats
Didn’t realize that. So when do you find so much time to write?
by Dan Turkenkopf on Dec 3, 2008 5:32 PM EST up reply actions 0 recs
Thanks.
I do my writing mostly after work or during the day on weekends. Sometimes I’ll get in the zone and get a lot done, and other times I’ll run out of time and do very little…
by Peter Bendix on Dec 6, 2008 4:07 PM EST up reply actions 0 recs













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