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
• \( Innings\ Pitched \) — 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 an important metric for evaluating pitcher performance, especially in today's home run-heavy baseball environment. A lower HR/9 indicates better ability to prevent home runs.

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 a pitcher struggles with 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 is crucial in modern baseball.

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 stat.

Q4: Can HR/9 predict future performance?
A: While it has some predictive value, HR/9 can be volatile from year to year due to the relatively small number of home runs allowed.

Q5: How has HR/9 changed over time?
A: League-average HR/9 has increased significantly in recent years due to changes in hitting approach and baseball construction.