In baseball, an assist (denoted by A) is a defensive statistic, baseball being the rare sport in which the defensive team controls the ball. An assist is awarded to every defensive player who fields or touches the ball (after it has been hit by the batter) prior to the recording of a putout, even if the contact was unintentional. For example, if a ball strikes a player's leg and bounces off him to another fielder, who tags the baserunner, the first player is credited with an assist. A fielder can receive a maximum of one assist per out recorded. An assist is also awarded if a putout would have occurred, had not another fielder committed an error. (see also: baseball statistics)

If a pitcher records a strikeout and the catcher catches the third strike, the pitcher is not credited with an assist. However, if the batter becomes a baserunner on a dropped third strike and the pitcher is involved in gaining a putout, the pitcher is credited with an assist just as any other fielder would be.

Assists are an important statistic for outfielders, as a play often occurs when a baserunner on the opposing team attempts to advance on the basepath when the ball is hit to the outfield (even on a caught fly ball that results in an out; see also: tag up). It is the outfielder's job to field the ball and make an accurate throw to another fielder who is covering the base before the runner reaches it. The fielder then attempts to tag the runner out. This is especially important if the runner was trying to reach home plate, as this assist prevents the baserunner from scoring a run. Assists are much rarer for outfielders than infielders because the play is harder to make, and because outfielder assist situations occur less often than the traditional ground-ball assist for infielders.

In recent years, some sabermetricians have begun referring to assists by outfielders as baserunner kills.

Baseball statistics

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