Did Toronto Blue Jays have cause to complain about umpire Sam Holbrook?
Former MLB umpire Jim McKean dies at 73
Harper HR powers Phillies past Padres and into World Series
Worst MLB Umpire Calls in Baseball History
Worst Call Ever? Sure. Kill the Umpires? Never. - The New York Times
Referee Magazine - August 2022 by Referee Magazine - Issuu
Umpire from Regina calls balls and strikes in historic postseason MLB game
MLB Umpires Missed 34,294 Pitch Calls in 2018. Time for Robo-umps?, BU Today
Ryan Castellani four hitless innings in MLB debut
Study -- Young umps top older peers on calls - ESPN
VIDEO: Umpire Reggie Drummer Criticized, Suspended for Bad Strike 3 Call
Close Call Sports & Umpire Ejection Fantasy League: 02 February 2020
How well do umpires call balls and strikes? - Beyond the Box Score
Can computers call 'em better than the umps? - The Boston Globe
Spencer Torkelson loses it on umpire over strike call