3) The ABS Challenge System has an even bigger impact than expected.
While the number of challenges per game (4.2) is right in line with what we saw at the Triple-A level last year, the impact of those challenges has been more pronounced.
Challenges have been more successful at the MLB level this year (53% overturn rate) than they were at the Triple-A level in 2025 (50%). The goal is to get more calls right, and the system is doing that.
ABS leads to a tighter strike zone -- especially at the top end -- than had been enforced previously. And that’s helping to offset the continued decline of batting average in our high-velo, high-spin, pitch-shaping environment that is such hell on hitters.
The walk rate (9.1%) is the highest it's been in a full season since 2000 (9.6%). So while the leaguewide batting average has dipped one point (.245 to .244) from last year, the on-base percentage has actually increased five points (.315 to .320). The strikeout rate has fallen a small amount, from 22.2% to 22%, but it’s the rise in walks that is most notable.