Left on base
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In baseball, a baserunner is said to be left on base (abbreviated LOB) when the half-inning ends, he has not scored, and he has not been put out. This is to include a batter-runner who, say, has hit into a fielder's choice, causing another runner to be put out as the 3rd out. Team LOB totals are commonly reported in a baseball box score. Individual LOB statistics can also be tracked.
LOB is used in "proving" a box score. The number of a team's plate appearances is to equal the sum of that team's runs, that team's LOB, and the opposing team's putouts. In other words, every batter who completes a plate appearance is accounted for by a run scored or by being put out or by being LOB.