The Last Round MMA / Jeff Darr AKA Mouth piece guy on starting his business, providing mouthpieces to Anderson Silva, Dominick Cruz, sponsorships, fighters being sick in his hand during fittings and more

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The Last Round MMA / Jeff Darr AKA Mouth piece guy on starting his business, providing mouthpieces to Anderson Silva, Dominick Cruz, sponsorships, fighters being sick in his hand during fittings and more

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