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.

That pitcher recorded the best ERA in the league.

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.

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
Rough benchmarks: under 2.00 is excellent, around 3.00 good, over 4.00 below average

Related Words

general

Added 2026.1.29 8:59 · Revised 2026.10.13 16:13

08500/08871_bougyoritsu