Opponent Batting Average OBA
OBA stands for opponent batting average in baseball. The batting average of all hitters against the pitcher — how often his at-bats against ended in a hit.
How OBA is calculated
OBA = hits allowed ÷ at-bats against
Not to be confused with on-base average: OBA here counts only hits, so a pitcher who walks many batters can post a low figure and still allow plenty of baserunners, which is what WHIP catches.
What counts as a good OBA?
Half of the 141 qualified MLB players in 2026 were at or below .244. The best tenth were under .213.
- Median
- .244
- Top 10% (low)
- .213
- Leader
- .157
Qualified: 100+ IP, non-zero, 2026 regular season.