Seattle Steelheads Team-Issued Jersey - Bat Boy

Bat Boy #BB - Team Issued Black Jersey with Seaver Patch - 2021 Season

Bat Boy #BB - Team Issued Black Jersey with Seaver Patch - 2021 Season

Recovering a forgotten piece of Portland's baseball history, the Rosebuds - OPB

Terrific Seattle Steelheads Negro League jerseys that the Mariners will wear this Saturday against the Red Sox : r/baseball

Seattle Mariners City Connect Breakdown: The story behind new uniforms - Seattle Sports

Cy Young winner Ray sharp in Mariners debut, tops Twins 2-1, Sports

Mariners, Cardinals to wear 1984 throwbacks

NLB - The Ultimate Negro Leagues Shop – tagged Seattle Steelheads – Royal Retros

Getting really good': Mitch Keller dominant, as Pirates leave Boston with surprising sweep of Red Sox

Bobby Robinson – Society for American Baseball Research