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

Ty France Game-Used Steelheads Uniform - Jersey, Pants, Cap

Here's a look at the Mariners' new City Connect jerseys and story behind them, Sports

Seattle Mariners' Dustin Ackley batting against the Boston Red Sox in a baseball game on Saturday, May 16, 2015, in Seattle. Both teams are wearing uniforms of Negro League teams of 1946

Mariners debut latest City Connect uniforms

Mariners, Red Sox to Wear Negro League Uniforms – SportsLogos.Net News

Julio Rodriguez Game-Used Steelheads Uniform - Jersey, Pants, Cap

The Mariners are these wearing throwback uniforms vs the Rays today to honor the Seattle Steelheads, a former Negro League team : r/baseball

Wayback Machine: A legacy of black baseball - Sportspress Northwest

Crawford's slam, 10th-inning run lifts Mariners past Rays - The Columbian

Mariners slug four homers to beat A's 8-2, snap 3-game skid

Top stories published by From the Corner of Edgar & Dave in April of 2015

Seattle Mariners unveil new spring training uniforms