Four umpires promoted to Major League crews

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

Fay Vincent has some good ideas on improving umpiring - NBC Sports

Alfonso Márquez - Wikipedia

AP: MLB appoints 1st black umpire crew chief

10 Major League Baseball umpires retire in historic exodus

Porter, Johnson become MLB's 2nd, 3rd Black ump crew chiefs

UConn alum learned his umpiring skills from Andy Baylock

Umpire Hernandez sues MLB, claiming race discrimination

Porter, Johnson become MLB's 2nd, 3rd Black ump crew chiefs - The San Diego Union-Tribune

Controversial umpire Angel Hernandez loses Major League Baseball lawsuit appeal

Minor League Umpires To Receive Significant Pay Raise In 2022 — College Baseball, MLB Draft, Prospects - Baseball America

Adrian Johnson, Alan Porter named crew chiefs

Nail the Postseason Transition to a Larger Crew

MLB umpiring crew goes from Joe West to Laz Diaz