Beloved umpire in Tennessee gets grand slam surprise from players
Remembering the Life and Legacy of Roberto Clemente
Are Baseball Umpires Racist? - TIME
It's not a whole new ballgame — yet — but Spokane's Christine Wren went to bat for future generations as a professional umpire in the 1970s
Umpires Ejections and Player Ethnicity: An Analysis
Umpires Wear Wristbands to Protest 'Abusive Player Behavior' - The New York Times
Racism In Sports: International Laws & Rules From Various Jurisdictions - Enhelion Blogs
The only day MLB players can wear No. 42? Jackie Robinson Day
MLB umpire Angel Hernandez has lawsuit appeal rejected by federal court
IJERPH, Free Full-Text
MLB umpires show discrimination against non-white players, according to new study
Robot Umpires in Baseball: A Terrible Idea
The Legal Ramifications of Racist Umpiring - Beyond the Box Score
Standardized nationalistic bias estimates across studies Notes: The
THE PRIVATE WORLD OF THE NEGRO BALLPLAYER - Sports Illustrated Vault