| Abbreviations | H/9, H/9IP |
| Type | Pitching |
| Components | hits allowed, innings pitched |
| Formula | |
|---|---|
| H / 9 IP = (H * 9) / IP | |
Hits allowed per nine innings pitched (H/9IP or H/9) is a statistic measuring the average number of base hits by a pitcher in nine innings pitched. Nolan Ryan has the lowest ratio in history, at 6.5553 H/9 IP.
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