Fans pointed out the coach's folly, which the league recently warned against due to a controversy over stolen signs on wrist devices between the Boston Red Sox and the New York Yankees, which led to league action. Arizona Assistant Coach Ariel Prieto apologized quickly after coming under fire, but didn't escape without a mark.
Although the MLB cleared Prieto of cheating, the league commissioner's office issued a fine to both Prieto and the team for violating a regulation.
The league said in a statement that it, "found no evidence that Mr. Prieto used the Apple Watch or cellphone for any purpose in the dugout, nor any baseball related communication on either device, during Wednesday's game."
MLB officials threatened serious sanctions to teams that violate similar league rules after the dust-up between the Red Sox and Yankees.
The MLB announced it would donate funds from the fine to hurricane relief efforts in Puerto Rico.