MLB will see 10 rookie umps replace veterans as position faces more changes, challenges than ever - The Athletic
Close Call Sports & Umpire Ejection Fantasy League: Jackpot Umpire Tom Hallion Retires After Lengthy Career
Joe West Breaks Record for Games Umpired - The New York Times
4 Man Umpire Mechanics
MLB umpire job responsibilities
Why is MLB still using 6 umpires in postseason games? - Bleed Cubbie Blue
Umpires Are Less Blind Than They Used To Be
The Average Yearly Income for Major League Umpires
Baseball Umpires Don't Get Overtime. Does That Affect Extra Innings? : NPR
Commentary: Major-league ump Ed Rapuano backs Pope John Paul II
Earning Their Stripes as Umpires and Referees - The New York Times
MLB Umpire Salary Revealed - How Much Do Baseball Umpires Make?