Zack Hample, who has caught thousands of balls at games and written a book about the practice, initially said he did not intend to give the ball back. He later softened his stance on the matter in an interview on SI Now.
Hample will return the ball at a press conference at Yankee Stadium on Friday, according to a statement released by the team. The charity Hample has supported since 2009 is Pitch In For Baseball, which donates equipment to kids who want to play the sport.
New York opens a three-game series against the Tampa Bay Rays on Friday.