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Year-by-Year Top-Tens Leaders & Records for Bases On Balls per 9 IP

+ - Indicates Hall of Famer. Bold indicates active player.

Statistic Description: 9 x BB / IP For recent years, leaders need 1 IP per team game played

This table lists the MLB top ten for each season in this category. When possible we have used the leaderboard standards at that time to compute the top ten players for this statistic.