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Single-Season Leaders & Records for Bases On Balls per 9 IP

Photo of George Zettlein Photo of Cherokee Fisher Photo of George Bradley Photo of Tommy Bond Photo of Tommy Bond Photo of Bobby Mathews Photo of Carlos Silva Photo of Guy Hecker   Photo of Al Spalding+ Photo of Pud Galvin+ Photo of George Bradley Photo of Sam Weaver Photo of Terry Larkin Photo of Jim Devlin Photo of Denny Driscoll Photo of Terry Larkin Photo of John Ward+ Photo of Tommy Bond Photo of Candy Cummings+

+ - 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

Only players who finished in the top 40 for the majors in a season will appear on this list.
Leaders from the current season are only included for rate stats after July 1st.

For batting rate stats, generally a minimum of 3.1 Plate Appearances/G, 1.0 IP/G, 0.67 Gm and Chances/Team Game (fielding), 0.2 SB att/Team Game (catchers), and 0.1 SB att/Team Game (baserunners only since 1951), and 0.1 decision/G for single-season leaderboards generally needed for rate statistics. For pitcher fielding the minimums are reduced by a third. For LF, CF, RF fielding stats, we only have reliable data since 1954, so all leaders are since 1954. Explanation of min. requirements


Note that seasons prior to 1876 are not included in single-season marks, but are included in career marks.