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The Wichita Eagle reports that Kaiser was struck by a follow-through swing near the on-deck circle on Saturday afternoon.

Baseball officials say the child was wearing a helmet.

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The home-plate umpire, who is also a paramedic, treated the boy until an ambulance arrived. The team announced the boy's death Sunday.

"With the permission of the family, and with much sorrow and a very broken heart, I regretfully inform everyone that Kaiser Carlile passed away earlier this evening," the team said, according to CNN. "Please keep his family and our team in your thoughts and prayers."

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