MLB anticipates the changes will be subtle, and a memo to teams last week 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 expected to be equipped with humidity-controlled storage spaces.
A person familiar with the note spoke to The Associated Press on condition of anonymity Monday because the memo, sent by MLB executive vice president of baseball operations Morgan Sword, was sent privately. The Athletic first reported the contents of the memo.