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Single-Season Leaders & Records for Walks & Hits per IP

Photo of Pedro Martinez+ Photo of Guy Hecker Photo of Walter Johnson+ Photo of Tim Keefe+ Photo of Addie Joss+ Photo of Greg Maddux+ Photo of Charlie Sweeney Photo of Ed Walsh+ Photo of Christy Mathewson+ Photo of Christy Mathewson+ Photo of George Bradley Photo of Mordecai Brown+ Photo of Pete Alexander+ Photo of Dave McNally Photo of <strong>Zack Greinke</strong> Photo of Henry Boyle Photo of Bob Gibson+ Photo of Sandy Koufax+ Photo of <strong>Clayton Kershaw</strong> Photo of Juan Marichal+

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

Statistic Description: (BB + H)/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.