Where Are Doug Harvey, Bill Klem and Other Great Umpires When We Need Them - Jugs Sports
MLB Twitter reacts to mass retirement of major league umpires: Don't let the door hit you on the way out, Wish Angel Hernandez was on this list
MLB will see 10 rookie umps replace veterans as position faces more changes, challenges than ever - The Athletic
1999 Baseball History - This Great Game
Thursday's baseball: Ex-ump Jim McKean dies at age 73
Longtime MLB umpire, Minot native Gary Cederstrom to retire
Tim Timmons (umpire) - Wikipedia
Are MLB's older umpires in danger?
The right time': Kentucky native retires from MLB umpiring after 24 years, Sports