MLB

• box score

  Two words.

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• slugging percentage

  Write out in all instances. Never “SLG” except in box scores.

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• on-base percentage

  Write out in all instances. Never “OBP” except in box scores.

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• WHIP

  Acceptable in all instances (in baseball contexts) when referring to the walks plus hits per innings pitched statistic.

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• ERA

  Acceptable in all instances (in baseball contexts) when referring to the earned run average statistic.

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• ERA+

  Acceptable in all instances (in baseball contexts) when referring to the weighted earned run average statistic, where 100 signifies league average.

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• OPS+

  Acceptable in all instances (in baseball contexts) when referring to the weighted on-base plus slugging statistic, where 100 signifies league average.

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• OPS

  Acceptable in all instances (in baseball contexts) when referring to the on-base plus slugging statistic.

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• WAR

  Acceptable in all instances (in baseball contexts) when referring to the wins above replacement statistic.

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• batting average

  Never use the acronym “BA” in copy or in headlines.

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