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Strikeout-to-walk ratio

From Wikipedia, the free encyclopedia

In baseball statistics, strikeout-to-walk ratio (K/BB) is a measure of a pitcher's ability to control pitches, calculated as strikeouts divided by bases on balls.

A hit by pitch is not counted statistically as a walk, and therefore not counted in the strikeout-to-walk ratio.

The inverse of this calculation is the related statistic for hitters, walk-to-strikeout ratio (BB/K).

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Single-season leader Phil Hughes (11.625 K/BB ratio).

A pitcher who possesses a great K/BB ratio is usually a dominant power pitcher, such as Randy Johnson, Pedro Martínez, Curt Schilling, or Mariano Rivera. However, in 2005, Minnesota Twins starting pitcher Carlos Silva easily led the major leagues in K/BB ratio with 7.89:1, despite striking out only 71 batters over 188⅓ innings pitched; he walked only nine batters.[1]

Through 2022, the all-time career leaders among starting pitchers were Chris Sale (5.3333), Jacob de Grom (5.3036), and Tommy Bond (5.0363).[2]

Through May 22, 2019, the all-time career leaders among relievers were Koji Uehara (7.94), Sean Doolittle (6.41), and Roberto Osuna (6.33).[3]

The player with the highest single regular season K/BB ratio through 2022 was Minnesota Twins pitcher Phil Hughes in 2014, with a ratio of 11.625 (186 strikeouts and 16 walks).[4] He is followed by Bret Saberhagen (11.00 in 1994) and Cliff Lee (10.28 in 2010).[2]


  1. ^ "Carlos Silva Career Statistics".
  2. ^ a b "Career Leaders &amp Records for Strikeouts / Base On Balls".
  3. ^ "Koji Uehara Hangs It Up". Fangraphs. May 22, 2019.
  4. ^ "Hughes Loses 500k Bonus Due to Rain Delay". ESPN. September 24, 2014.

This page was last edited on 5 August 2023, at 06:12
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