1. What is HR/9?

HR/9 (Home Runs per 9 innings) is a baseball statistic that measures how many 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 fair 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 indicate better home run prevention.

4. Using the Calculator

Tips: Enter total home runs allowed (whole number) and total innings pitched (can include fractions like 6.2 for 6⅔ innings). Both values must be valid (home runs ≥ 0, innings > 0).

5. Frequently Asked Questions (FAQ)

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

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 run prevention.

Q3: Does ballpark factor affect HR/9?
A: Yes, pitchers in hitter-friendly ballparks may have higher HR/9 values, so context is important when evaluating this statistic.

Q4: Can HR/9 be used for fantasy baseball?
A: Absolutely! HR/9 helps identify pitchers who are less likely to give up home runs, which can be valuable in fantasy leagues.

Q5: How stable is HR/9 year-to-year?
A: While generally stable, HR/9 can fluctuate due to factors like changes in pitching approach, defense, or luck on fly balls.