Brewers spotlighted in midseason look at how MLB teams use ABS challenges

Major League Baseball’s Automated Ball-Strike (ABS) system, which began the season as an official part of games, has changed how teams think about disputing certain pitch calls. Instead of relying on the same human-led evaluation process for every challenge, ABS incorporates a fully automated review framework based on Statcast tracking, allowing teams to challenge select balls and strikes that fall within the system’s defined parameters.

At the All-Star break, Yahoo Sports published a team-specific look at how the Milwaukee Brewers have used those ABS challenges during the first half of the schedule. The premise is straightforward: with more than half a season of data now available, teams’ challenge tendencies can be compared to see how aggressively they try to correct calls when ABS is available for review.

The Brewers’ review matters less for what ABS does and more for what it reveals about decision-making. ABS can turn a marginal pitch into an actionable replay result, which encourages managers to treat some counts and pitch locations differently than they might under older challenge patterns. In that sense, a team’s “usage rate” and the timing of challenges reflect their staff’s belief in whether the automated system will agree with the call on the field.

For Milwaukee specifically, the midseason profile frames the Brewers as one of the teams whose challenge behavior can be studied now that the league has had enough time to generate a meaningful sample. The article’s focus is not on a single game outcome, but on how the Brewers are applying the technology across the season’s landscape, where tendencies can vary by opponent, pitcher style, and game leverage.

It is important to keep the scope of the analysis in perspective. Even with ABS, not every call is eligible for challenge, and teams still have to decide how to spend limited opportunities within game flow. So a team that challenges more often is not necessarily suggesting umpires miss more frequently. It can also indicate the club’s coaching staff is more willing to bet that ABS will overturn borderline pitches, or that the Brewers are more confident in their pitch calling and the types of situations in which challenges tend to succeed.

What to watch next is whether the Brewers’ midseason approach holds under the higher leverage of late-season series, where one corrected call can shift an inning’s swing. If MLB’s ABS rollout continues to stabilize and teams refine their challenge habits, the second half may show a widening gap between clubs that use ABS proactively and those that save challenges for the rarest, most clearly reviewable moments.

The story also points to a broader league trend. ABS is not simply a technical upgrade, it has created a new layer of strategy that sits beside standard bullpen management and pitch sequencing. The teams that best integrate automated review into in-game decision-making will likely feel the benefits most in close contests, particularly in games decided by a small number of swings. Yet any evaluation of “best use” will remain context-driven, shaped by game states and by how often the system’s review criteria are actually met.