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This is wonderful! Just because people can't see doesn't mean they can't play a competitive sport. Beep Baseball uses beeping softballs and bases to tell players when to swing the bat and where to find the bases. The pitcher is on the offensive team and an announcer calls out the location of balls hit into the field. Otherwise, it's almost identical to softball.
-via TYWKIWDBI
I think that was invented by the Telephone Pioneers.
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