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

Juneteenth celebrations: Seattle Mariners honor Negro Leagues

Felix falters as Mariners lose, Professional Sports

Red Sox, Mariners To Wear Negro League Throwbacks May 16 In Seattle (Photos)

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.

Ebbets Field Flannels Seattle Steelheads 1946 Home Jersey

Remembering the Steelheads, Seattle's Negro League Team - Seattle magazine

Seattle Mariners Nike City Connect Jersey 2023

MLB City Connect uniforms, ranked: Where Orioles' new Nike look fits between worst (Giants) and best (Marlins)