1. What is HR/9?

HR/9 (Home Runs per 9 innings) is a baseball statistic that measures the average number of home runs a pitcher allows per nine innings pitched. It helps evaluate a pitcher's ability to prevent home runs.

2. How Does the Calculator Work?

The calculator uses the HR/9 formula:

Where:

• \( Home\ Runs \) — Total number of home runs allowed
• \( Innings \) — Total innings pitched

Explanation: The formula normalizes home run rate to a standard 9-inning game, allowing for comparison between pitchers regardless of innings pitched.

3. Importance of HR/9 Calculation

Details: HR/9 is a key metric for evaluating pitcher performance, particularly their ability to limit damaging extra-base hits. Lower HR/9 values generally indicate better pitching performance.

4. Using the Calculator

Tips: Enter the total number of home runs allowed and total innings pitched. Innings can be entered as whole numbers or decimals (e.g., 6.2 for 6⅔ innings).

5. Frequently Asked Questions (FAQ)

Q1: What is a good HR/9 value?
A: Generally, a HR/9 below 1.0 is considered excellent, while values above 1.5 may indicate susceptibility to home runs.

Q2: How does HR/9 compare to other pitching metrics?
A: HR/9 complements metrics like ERA and WHIP by specifically measuring home run prevention, which can significantly impact game outcomes.

Q3: Can HR/9 be used to predict future performance?
A: While useful, HR/9 can be volatile year-to-year due to factors like ballpark effects and luck on fly balls.

Q4: Does HR/9 account for ballpark factors?
A: No, raw HR/9 does not adjust for ballpark dimensions or other environmental factors that influence home run rates.

Q5: How should innings be entered for partial innings?
A: Enter partial innings as decimals (e.g., 0.1 for ⅓ inning, 0.2 for ⅔ inning).