Controversial umpire Angel Hernandez loses Major League Baseball lawsuit appeal
John Shipley: MLB's experimental “Challenge” system has legs – Twin Cities
MLB umpires on planes with teams? How could that possibly go wrong? - Federal Baseball
Pittsfield's Justin Hopkins heads south to umpire for the summer in Appalachian League, Local Sports
SouthCoast Struggles with Youth Baseball Umpire Shortage
Umpires walk off field, quit after little league parents, players threaten them
Astros' Abreu suspended 2 games by MLB, which says he intentionally threw at García
Local umpire reacts after parents threaten at Mass. Little League game
Pirates erase 4-run deficit, deliver impressive performance to salvage split against Braves
Local umpire reacts after parents threaten at Mass. Little League game
MLB Umpires Missed 34,294 Pitch Calls in 2018. Time for Robo-umps?, BU Today