entitlement to advance a base
Baseball term: the right of a batter or runner to advance to the next base without being put out, typically due to a walk, hit-by-pitch, or other ruling. Often used in the compound エンタイトルツーベース (ground-rule double).
from English entitle
See also: エンタイトルツーベース
The batter got an entitlement to advance on a walk.
The runner advanced to second base on a ground-rule double.