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Baseball Opponents Batting Average (OBA) Calculator (aka Batting Average Against (BAA))

OBA Calculator

0.308

What is OBA?

Opponents Batting Average (OBA), also known as “Batting Average Against (BAA) is a baseball metric used to give an average of all hitter’s batting average against a pitcher.
It is considered useful as it gives a pitcher-oriented number that is directly comparable to the popular Batting Average (BA), making it easy for fans to understand.

How to calculate OBA

In Baseball, OBA is calculated as:
OBA = Hits / (Batter Faced – Walks – Hit by Pitch – Sacrifice Hits – Sacrifice Flies – Catcher’s Interference)

Example

If a pitcher has has 190 hits, 43 walks, 677 batters faced, 3 hit by pitch, 6 sacrifice hits, 7 sacrifice flies, and 1 catcher interference then:
OBA = 190 / (677 – 43 – 3 – 6 – 7 – 1)
OBA = 190 / 617
OBA = 0.308
Therefore, the pitcher’s OBA is 0.308.