AP source: MLB slightly deadening balls amid HR surge

NEW YORK (AP) — Major League Baseball told teams in a memo last week that it has slightly deadened its baseballs amid a years-long surge in home runs, according to a person familiar with the note.

MLB anticipates the changes will be subtle, and the memo cites an independent lab that found the new balls will fly 1 to 2 feet shorter on balls hit over 375 feet.

Five more teams also plan to add humidors to their stadiums, raising to 10 of MLB's 30 stadiums expect to be equipped with humidity-controlled storage spaces.

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