Players in the second tier of U.S. men's soccer leagues have formed a union for collective bargaining.
The United Soccer League said Tuesday its USL Championship clubs have recognized the USL Players Association as their players' exclusive bargaining representative.
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USL Chief Executive Officer Alec Papadakis says "in many ways, this is simply the next, natural step in the evolution of building a great and enduring professional soccer league."
Major League Soccer, the only first-tier men's league…