Rafael Filippini’s aviation experience and work with composites translated well to the production of racquetball and other rackets.

Rafael Filippini’s aviation experience and work with composites translated well to the production of racquetball and other rackets. Photo by Jamie Scott Lytle.

— It was during his five-year stint in the United States military that Rafael Filippini, founder and president of Gearbox Sports, discovered the game — and the business — of racquetball...

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