MLB established a few new rules this season, including one that pitchers are only allotted two pickoff throws during each at-bat.
Braves outfielder Ronald Acuña Jr. tested this new rule on Opening Day on Thursday vs. the Nationals. Acuña is known as a speedster—he finished seventh in the league last season with 29 stolen bases, and has 107 in his five-year career. Nationals pitcher Patrick Corbin was well aware of this, and made sure to keep an eye on Acuña in the top of the first inning.
However, Corbin used his two pickoff throws pretty quickly, and once Acuña noticed this, he took full advantage in order to make it to second base with relative ease.