Umpire Ron Kulpa ejects catcher A.J. Pierzynski with Yu Darvish throwing no-hitter
Baseball Umpires in 1921 – Society for American Baseball Research
Ump Show: Umpire Ron Kulpa ejects A.J. Hinch, screams 'I can do anything I want!' during meltdown
These MLB umpires have the worst strike zones - The Washington Post
Lower Mainland Baseball Association - Archives
Watch: Outrageous umpire puts on a show with third strike calls
Former MLB umpire Jim McKean dies at 73
Watch: Outrageous umpire puts on a show with third strike calls
Umpire Stu Scheurwater Just Made the Worst Call of the 2022 Season
MLB Umpires and the Classification of Strike-Three Calls
Spencer Torkelson loses it on umpire over strike call
Umpires get ball/strike calls wrong 14% of the time, study finds - Los Angeles Times