Mariners to Wear Seattle Steelheads Uniforms May 16 vs. Boston, by Mariners PR

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2015 Major League Baseball season - Wikipedia

Seattle Steelheads Premium Hoodie Negro Leagues Sweatshirt

History:  The West Coast Baseball Association was an attempt at a western Negro League competitor, but it only lasted one season. The Seattle entry in the league was actually Abe Saperstein's Harlem Globetrotter baseball team under a new name, that of a local variety of salmon.

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