http://iscoresports.com/

I have a player with a .483 OBP

22 AB
7 H
6 BB
1 HBP
1 SCB

I would expect OBP to be (7 + 6 + 1) / (22 + 6 + 1 + 1) = 14 / 30 = .467, but my stats are showing a .483 which is 15/31.

Am I missing a stat somewhere?

We would have to see your data (email us your customer ID to support@fasterthanmonkeys.com, and the player).

Here is what we are currently using for OBP:

([bunts singles] + [singles] + [doubles] + [triples] + [homeruns] + [walks] + [hitByPitch])
-------------------------------------------------------------------------------------
([atBats] + [walks] + [hitByPitch] + [sacFlys])


Here is the source for using that equation:

http://en.wikipedia.org/wiki/On-base_percentage" onclick="window.open(this.href);return false;

Sounds like it's actually 14/29 (removing the sac bunt) which is also .483.
The Wikepedia entry explains the removal of sac bunts from the plate appearance:
"as bunting is an offensive strategy – often dictated by the manager – the use of which does not necessarily reflect on the batter's ability and should not be used to penalize him." (or her)

That makes sense caged1... we would actually expect that if it was 15/31, it would be .484 because of rounding (.4838 would round up to .484) whereas 14/29 would be correct (.4827 rounded up to .483).

Thanks all. You are correct. The number is 14/29. We were trying to get the .483 using the PA stat and backing into the OBP from there - PA includes SacBunts - OBP does not.