@david_johnson11 : If you’re working in youth sports and considering the measurement of maturation. Here is what you need to know… • TwiCopy

David Johnson

@david_johnson11

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“Maturation Man” “Not just a numbers guy”

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calendar_today26-12-2010 20:33:19

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David Johnson

@david_johnson11

2 years ago

If you’re working in youth sports and considering the measurement of maturation. Here is what you need to know…

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