The 2019 season marked the first year of MLB’s three-year contract with the Atlantic League. The collaboration brought sweeping changes to the sport, as numerous rule changes were implemented in independent league games.
Among them included a three-batter minimum for pitchers, the ability to steal first base and the elimination of mound visits. Perhaps most intriguing, however, was the addition of an automated strike zone that assisted umpires with calling balls and strikes.
After a successful test run, MLB commissioner Rob Manfred revealed that the concept would be introduced to Minor League Baseball games this season.