base runner

English Thesaurus

1. a baseball player on the team at bat who is on base (or attempting to reach a base) (noun.person)

hypernym	:	ballplayer, baseball player,
definition	:	an athlete who plays baseball (noun.person)

domain category	:	baseball, baseball game,
definition	:	a ball game played with a bat and ball between two teams of nine players; teams take turns at bat trying to score runs (noun.act)