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DJO Incorporated's beginnings are tied to professional sports. The company was founded in the Carlsbad, California garage of Philadelphia Eagles football player Mark Nordquist in 1978. Nordquist, who wrapped an old inner tube around his unstable knee for support, teamed up with two of his friends to explore the possibilities of using neoprene instead. Their new Company - then named DonJoy after two of the men's wives, Donna and Joy - had its first products, "kneesleeves", constructed from old neoprene wetsuits. This innovative concept attracted interest and the company soon embarked on a research and engineering program that would advance the world of bracing.