noun
combined walks and hit-by-pitches
A Japanese baseball pitching statistic that sums bases on balls (四球) and hit batsmen (死球). Used in sabermetrics and game summaries.
彼は四死球が多く、制球に苦しんでいる。
He has a lot of walks and hit-by-pitches, struggling with his control.
この投手の四死球率はリーグ平均より高い。
This pitcher's combined walk and hit-by-pitch rate is higher than the league average.
死球 refers specifically to a hit-by-pitch. 四死球 combines this with walks into one metric.
Compound of 四 (four, here referring to a base on balls) + 死 (dead, here referring to a dead ball or hit-by-pitch) + 球 (ball). The term is a modern baseball coinage.