In 1973, new fashion for baseball umpires was strictly a judgment call - The Boston Globe

San Fernando Valley Baseball Umpires Association - SFVBUA staff members Alex Sanchez and Devin Shehab at 2018 BBUC Riverside

Referee Magazine - May 2018 by Referee Magazine - Issuu

Giants vs Dodgers umpire explains Wilmer Flores check swing call - Sports Illustrated

Peter Imber – pawnedaccordion

Baseball Umpires in 1921 – Society for American Baseball Research

WATCH: Marlins pitcher loses it after umpire calls three balks in same inning, Mattingly also tossed

To former Labor Board chair, MLB's acrimony is unlike what's come before. That's a good thing. - The Boston Globe

IPFW www.IndianaRBI.com

Books and Blogs – SABR's Baseball Cards Research Committee

Upper Deck – SABR's Baseball Cards Research Committee

Upper Deck – SABR's Baseball Cards Research Committee