MLB's automated balls and strikes (ABS) system for All-Star, explained
If you're here, you might be wondering how it all works to get balls and strikes called automatically.
First, some history: Amid complaints from fans and many players about the umpires' struggles with accurately calling the strike zone, MLB tested its compromise for the first time this spring with some success. There was an option to challenge ball-strike calls in the middle of an at-bat.
Here's how it works and how it'll work on Tuesday night:
What is ABS?
ABS is MLB's name for an automated strike zone -- also known as robot umps. In the All-Star Game, there will be a human umpire behind the plate, signaling the calls communicated through ABS.
How will ABS work in the All-Star Game?
A batter, catcher or batter can tap their helmet or hat to tell an ump to challenge a call, with two challenges allowed per team. The team retains its challenges if the review is successful.
Worth noting: instead of having challenges signaled from the dugout, ABS challenges can only be made by a hitter, pitcher or catcher. And it must be done immediately after the pitch. Again, the request cannot come from the dugout at all.
Will we see ABS in the regular season sometime soon?
There's a possibility for 2026. We'll see!
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