(Redirected from BB/9)
The average number of walks a pitcher allows over 9 innings.
| All Time Leaders | |||
|---|---|---|---|
| Span | Player | Total | Notes |
| Career | Tommy Bond | 0.58 | |
| Season | George Zettlein | 0.23 | 1876 |
| Season (since 1901) | Carlos Silva | 0.43 | 2005 |
| 1000 inning minimum for career | |||
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