Mariners Seattle Steelheads Uniforms

The Seattle Mariners will add another throwback uniform to their uniform arsenal on May 16th when they take on the Boston Red Sox.  The Mariners will honor the Steelheads that was part of the Negro Leagues.  Until recently there was not any photos of what the actual Steelheads uniform looked like until a baseball historian was able to stumble across a rough picture, and that is what these uniforms are based off of.