noun
games behind; GB
Baseball term: the difference in the win-loss records between two teams, expressed as the number of games one team trails the leader.
首位チームとのゲーム差は2.5だ。
They are 2.5 games behind the first-place team.
今日の試合でゲーム差が縮まった。
The games-behind gap narrowed with today's game.