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⚾ | Ori Miyagi, who has the second highest ERA, Ham Ito, who has the highest strikeout rate ...

Photo Seibu / Gakuto Wakabayashi, Rakuten / Takahisa Hayakawa, Orix / Hiroya Miyagi (from left) [Photo: Yuji Arakawa]

Ori Miyagi, who has the second highest ERA, and Ham Ito, who has the highest strikeout rate.

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In five games, he has won 5-3 and has an ERA of 0, which is second in the league.

Six weeks have passed since the opening of top professional baseball at Seibu Wakabayashi with 14 stolen bases and Rakuten Hayakawa with K / BB.6 for each team ... → Continue reading


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3 wins 0

Defense rate

Defense rate(Bougoritsu, Earned Run Average / ERA)baseball,cricketAnd so onpitcherGave in the prescribed inningsSelf-responsibilityIs the average value of.

The lower the earned run, the lower the value, so the lower the value, the better.


Calculate with the following formula.

  • Earned run average = earned run x 9 ÷ innings pitched

Defensive rate, pitcherSelf-responsibilityIs represented by one match (1 innings). For pitchingfraction(13,23) Is included,IntegerCalculate not only the part but also the fractional part.Generally, the numerical value calculated by the above formulaDecimal3th placeRoundingThen, the value up to the second place is displayed (if it is divisible to the second place, the remaining digits are filled with 2). When displaying the defensive rate in the ranking, if there are two or more pitchers with the same value up to the second decimal place but strictly different values, it will be displayed until the third decimal place and after To do.

If the pitcher is replaced while leaving the runner in the middle of the inning, the runner's score will be the pitcher before the replacement.GoalAnd recorded as self-responsibility (with exceptions.Self-responsibilitySee also).Therefore, the relief pitcher may not reflect the actual situation in the apparent ERA (for example, even if the ERA is 0.00, the runner allowed by the pitcher before the change may be scored), and the ERA may be scored. It is difficult to evaluate.

The team ERA can also be calculated by the above formula.In that case, replace "earned run" and "innings pitched" with "earned run of the team" and "innings pitched by the team", respectively.However, the earned run value of a team may differ from the total earned run of all pitchers on that team (Self-responsibilitySee also).On the other hand, for the pitching times of the team, the total value of the pitching times of all pitchers is used as it is.


The definition above is just an exact representation of the definition, but the division is supposed to be done first. For this reason,calculatorPrior to the spread of, the fractional part of the pitch was used to simplify the calculation.RoundingThere is a time when I calculated it after converting it to an integer. In addition, a formula was also officially calculated in which the self-reliance point was divided by the number of pitches, rounded off, and then multiplied by 9. Therefore, it should be noted that past player records may be official records that are different from the values ​​calculated by the current regulations.

Japanese professional baseballThen,1983から

  • Defensive rate = (self responsibility x 9 x 3) ÷ (throw times x 3)

The ERA is now defined by the formula.Earned run 53, pitching times 19323In the case of, the ERA is 2.46.

Before that, the calculation formulas differ depending on the period, such as rounding up to 1963 and rounding up from 1964 to 1982. Is supposed to calculate.

Due to the calculation method, pitchers with self-responsibility that can only take a small out may have a large defensive rate of 50 or more, or rarely 100 or more.Yutaka OnoHas an ERA of 1 (innings pitched) in the first professional season (1977)13, There is an example of recording an earned run 5).

In addition, pitchers who could not get any outs have 1 pitches (on record).03), So the ERA cannot be calculated (Division by zeroBecause it will be). In this case, instead of a number, some symbol such as a horizontal lineInfinityIt may be regarded as "and may be referred to as "∞").

Japanese professional baseball

Best defense rate

Personal total record

  • At the end of the 2020 season. 2000 pitches or more[1].

Personal season record

RankingPlayer nameClubDefense rateRecord year
1Hideo FujimotoTokyo Giants Army0.731943
2KageuraOsaka Tigers0.79Autumn 1936
3Eiji SawamuraTokyo Giants Army0.81Spring 1937
4Jiro NoguchiOcean Army0.881941
5Yasuo HayashiAsahi Army0.8871943
6Kotaro MoriHankyu Army0.8891941
7Jiro NoguchiWing army0.9301940
8KageuraOsaka Tigers0.931Spring 1937
9Hiroshi SudaTokyo Giants Army0.971940
10Murayama MinoruHanshin Tigers0.981970
At the end of 2020 season[2]
After 2 league system
RankingPlayer nameClubDefense rateRecord yearRemarks
1Murayama MinoruHanshin Tigers0.981970SE LeagueRecord
2Kazuhisa InaoNishitetsu Lions1.061956Pacific LeagueRecord
3Murayama MinoruOsaka Tigers1.191959
4Murayama MinoruHanshin Tigers1.201962
5Masahiro TanakaTohoku Rakuten Golden Eagles1.2722011
6Masahiro TanakaTohoku Rakuten Golden Eagles1.2732013
7Shoichi KanedaJNR Swallows1.301958
8Takehiko BesshoYomiuri Giants1.331955
9Yukio ShimabaraNishitetsu Lions1.351956
10Kazuhisa InaoNishitetsu Lions1.371957
At the end of 2020 season[2]

Reference record

More than 1000 pitches and less than 2000 pitches
RankingPlayer nameDefense rateThrow timesSelf-responsibility
1Kotaro Mori1.921805.1386
2With Darvish1.991268.1281
4Hiroomi Oyane2.121296.2306
5Horiuchi Sho2.171017.2245
6Fujita Motoshi2.201701.0415
7Michio Nishizawa2.231297.0321
8Masahiro Tanaka2.301315.0336
9Fukushi Isamu2.331100.2285
10G. Bucky2.341596.2416

Major league baseball

Best defense rate

Personal total record

RankingPlayer nameDefense rate
1Ed Walsh1.82
2Adi Joss1.89
3Mordecai Brown2.06
4Monte Ward2.10
5Christy matthewson2.13
6Albert Spalding2.14
7Lube Waddell2.16
8Walter johnson2.17
9Will White2.276
10Ed Royleback2.284
RankingPlayer nameDefense rate
11Tommy Bond2.31
12Eddy plank2.35
13Larry Corcoran2.36
14Eddie Secot2.38
15Doc White2.39
16(English edition2.42
17Jim McCormick2.431
18George Bradley2.434
19Chief vendor2.46
20(English edition2.471
  • See Baseball Reference[3]

Personal season record

RankingPlayer nameClubDefense rateRecord yearRemarks
1(English editionBoston Red Sox0.961914A leagueRecord
2Mordecai BrownChicago Cubs1.041906National LeagueRecord
3Bob GibsonSt. Louis Cardinals1.121968
4Christie MatthesonNew York Giants1.141909
Walter johnsonWashington Senators1913
6Jack FeasterChicago Cubs1.151907
7Adi JossCleveland Indians1.161908
8(English editionChicago Cubs1.171907
9Pete AlexanderPhiladelphia Phillies1.221915
10Sai YoungBoston Red Sox1.261908
  • Since 1901, more than the specified number of pitches in each year


[How to use footnotes]
  1. ^ Highest record ever Defense rate [total record] -NPB.jp Japan Baseball Organization
  2. ^ a b Highest record ever defense ratio [season record] -NPB.jp Japan Baseball Organization
  3. ^ MLB Career ERA -Baseball Reference

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