Umpire concerns important for MLB amid coronavirus pandemic - Sports Illustrated
The Ultimate Guide to How to Become an MLB Umpire? - NISR
MLB, Umpires Agree to 2020 Salary Reduction
MLB reaches deal on pay structure with umpires during pandemic - ESPN
Umpires reach deal with MLB for coronavirus-shortened season, take 30 percent pay cut
Highest-Paid MLB Umpires - Average Salary of MLB Umpire
How Much Do MLB Umpires Make? - EssentiallySports
How Much Do MLB Umpires Make per State? - CareerLancer
MLB, umpires come to an agreement on 2020 pay - NBC Sports