MLB umpires have a new signal to call this spring - Sports Illustrated

MLB looking at electronic system for calling pitches

MLB Outlines Plan for Umpires to Check Pitchers' Hands for Foreign Substances, News, Scores, Highlights, Stats, and Rumors

YOWZAMLB Players Give Opinion on Salt Lake City, UT

WholeHogSports - Changes to rules, video reviews in 2019

Are all base umpires capable of being a home plate umpire, in case the home plates umpire gets injured? - Quora

MLB umpires have a new signal to call this spring - Sports Illustrated

MLB suspends New York Yankees' Josh Donaldson for one game over comments to Chicago White Sox's Tim Anderson - ESPN

I Find It Very Difficult' to Watch: Why MLB Greats Think Baseball's in Trouble, News, Scores, Highlights, Stats, and Rumors

Las Vegas Aviators to test Automated Ball and Strike system in 2022, Aviators

Joe West breaks umpiring record with 5,376th game

MLB and the umpires reach a five-year labor agreement - NBC Sports

Loran Smith dislikes robot umpires, MLB designated hitter rules

As They See 'Em: A Fan's Travels in the Land of Umpires eBook : Weber, Bruce: Kindle Store

MLB veterans chafe at Rob Manfred's vision: Always 'some stupid new rule

JULY 20, 1959 SPORTS ILLUSTRATED - SOVIET ATHLETES * 3RD MLB LEAGUE * SAN FRAN