防御率(ぼうぎょりつ)

ぼうぎょりつ
noun
ERA, earned run average
1. ERA, earned run average
A baseball statistic measuring the average number of earned runs a pitcher allows per nine innings pitched.
防御率(ぼうぎょりつ)が2.50だ。
The ERA is 2.50.
あの投手(とうしゅ)はリーグ最高(さいこう)の防御率(ぼうぎょりつ)を記録(きろく)した。
That pitcher recorded the best ERA in the league.
防御率(ぼうぎょりつ)が低(ひく)いほど投手(とうしゅ)の成績(せいせき)が良(よ)い。
The lower the ERA, the better the pitcher's performance.

防御率(ぼうぎょりつ) is a key statistic in Japanese baseball (野球(やきゅう)). It measures pitcher effectiveness.

CALCULATION:

  • 防御率(ぼうぎょりつ) = (自責点(じせきてん) × 9) ÷ 投球(とうきゅう)回数(かいすう)
  • 自責点(じせきてん): earned runs
  • 投球(とうきゅう)回数(かいすう): innings pitched

GENERAL BENCHMARKS:

  • 2.00以下(いか): excellent
  • 3.00前後(ぜんご): good
  • 4.00以上(いじょう): below average

RELATED BASEBALL TERMS:

  • 投手(とうしゅ): pitcher
  • 先発(せんぱつ)投手(とうしゅ): starting pitcher
  • 勝利(しょうり)数(すう): wins
  • 奪(うば)三振数(すう): strikeouts

Baseball is extremely popular in Japan, with NPB (日本(にほん)プロ野球(やきゅう)) being the top professional league.

general
Added 2026.1.29 8:59
08500/08871_bougyoritsu