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Major League Baseball directs 100% of its royalties from on-field 9/11 Remembrance caps to MLB Charities, a 501 (3) nonprofit. MLB Charities will then donate those funds to the National September 11 Memorial & Museum. The Seattle Mariners wore this special 9/11 Memorial 59FIFTY fitted hat during their game on Sept. 11, 2021, in commemoration of the events that took place that day in 2001.

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