San Francisco Sea Lions Jersey Negro Leagues Willie Mays Giants

The uniforms actually belonged to the San Francisco Cubs, a little known team that rarely played in San Francisco and traveled the country year round.

10 greatest Negro Leagues uniforms

Sports Oakland Public Library

San Francisco firsts: All of the city's surprising historic moments

Giants uniform hi-res stock photography and images - Alamy

San Francisco Giants

Negro Leagues Facts for SF Giants Fans

History: The Birmingham Black Barons joined the original Negro National League in 1928. After that circuit's demise they became charter members of the Negro American League. In 1948 they defeated the Monarchs for the pennant with a 15 year-old Willie Mays in the outfield.

Ebbets Field Flannels Birmingham Black Barons 1923 Home Jersey

Art López – Society for American Baseball Research

Giants legend Willie Mays a Negro Leagues alum

10 greatest Negro Leagues uniforms

African American Heritage Night

Rachel Heit on LinkedIn: Congrats team! Amazing!

Celebrate African American Heritage

Willie Mays San Francisco Giants MLB Jerseys