1. What is Opponents Batting Average?

Opponents Batting Average (OBA) is a baseball statistic that measures how often a pitcher allows hits when batters put the ball in play against them. It's calculated by dividing hits allowed by at bats against.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• Hits Allowed — Number of hits given up by the pitcher
• At Bats Against — Number of official at bats against the pitcher

Explanation: This ratio shows what percentage of at bats result in hits against the pitcher.

3. Importance of Opponents BA

Details: OBA is a key metric for evaluating pitcher performance. Lower values indicate better performance, with elite pitchers typically maintaining OBAs below .220.

4. Using the Calculator

Tips: Enter whole numbers for hits allowed and at bats against. At bats must be greater than 0, and hits cannot exceed at bats.

5. Frequently Asked Questions (FAQ)

Q1: How does Opponents BA differ from regular Batting Average?
A: It's the same calculation but from the pitcher's perspective - showing how often batters get hits against them.

Q2: What's considered a good Opponents BA?
A: Below .250 is generally good, below .220 is excellent, and above .300 is poor for a pitcher.

Q3: Does this include walks or hit by pitches?
A: No, only official at bats count (excluding walks, sacrifices, hit by pitches, etc.).

Q4: How often should this be calculated?
A: For meaningful results, calculate over at least 100 at bats against to reduce small sample size effects.

Q5: Does this account for defensive performance?
A: No, it's influenced by team defense. Fielding Independent Pitching (FIP) may better isolate pitcher performance.