Joe Paris is the boy's father. He says his son was at second base when his teammate connected for a game-winning hit.
As his son rounded third, he threw off his helmet in celebration. It hit his coach, Alan Beck, in the leg.
Beck is now seeking $500,000 in damages, claiming the helmet caused his Achilles injury.
"I thought it was a joke," said Paris. "Then I realized it absolutely wasn't. Now I think it's absurd."
The case goes before a judge in March.Paris says he has already spent $4,000 fighting the case.
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