African American professional baseball debuts in Seattle on June 1, 1946.

Jackie Robinson wasn't the first African American Major League player - The Washington Post

Black Baseball Pioneer Bud Fowler Elected to Hall of Fame - The New York Times

Satchel Paige - Wikipedia

Ranking MLB's City Connect uniforms - ESPN

Iowans who have played in the majors

Major League Baseball Season Recap 1946 - This Day In Baseball

Greatest debut dates for baseball Hall of Famers

Mariners 2018 Season in Review, by Mariners PR

Baseball Hall of Fame Will Create New Exhibit on Race - The New York Times

Paul Hardy – Society for American Baseball Research

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