Sponsoring Junior bowlers brings up too many difficulties, just think of all the things that come up when a shoe company "gives" a high school bball player some shoes. There is YABA eligibility, High School eligibility, it has the potential to affect college eligibility. It's just not worth it.
Once you go adult, win some tournaments, rack up some honor scores and get your name out there. Ball companies sponsor people for the exposure they can give the product with the hopes that the exposure leads to increased sales. Good luck
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The clock on the wall says 3 O'Clock...last call...for Alcohol!
"I love a martini -- but two at the most. Three I’m under the table; Four, I’m under the host." Dorothy Parker