noun, noun or participle which takes 'suru', intransitive verb
getting on base; reaching base
The act of a batter safely reaching a base. Used as a noun or with する to describe the event.
彼は四球で出塁した。
He got on base with a walk.
初回、先頭打者
In the first inning, the leadoff batter reaches base.
noun
times on base; TOB
A statistic counting how many times a player has reached base. Often used in sabermetrics.
彼の今シーズンの出塁はすでに100を超えている。
His times on base this season have already exceeded 100.