The challenge system for calling balls and strikes seems to be less than a year away. MLB commissioner Rob Manfred tells Evan Drellich of The Athletic that the league will propose that change, to go into effect in the 2026 regular season, to the Competition Committee. While the term “propose” may sound uncertain, MLB essentially has the ability to pass any on-field rule changes it wants.

MLB and the Players Association established the Competition Committee within the 2022 collective bargaining agreement. It’s an 11-person panel that consists of six league personnel, four player representatives, and one umpire. That committee can pass rule changes by majority vote.

The league reps have a majority of their own, so they’re able to pass any league initiatives over the objections of the players as long as there’s no dissension within their ranks. That happened with the 2023 changes that included the introduction of the pitch clock and limits on defensive shifts, which the Committee passed over unanimous “no” votes from the four players.

The MLBPA knew at the time of the 2022 CBA that the setup was essentially handing over complete control of on-field rules to the league. MLB had a formal unilateral right to implement rule changes under previous CBAs, but the union had the ability to block any change for one year before the league could override it. The Competition Committee has the authority to implement a rule change after 45 days, so any offseason measures go into effect the following season.

The players on the Committee may well be in support of the automatic zone regardless. (It’ll perhaps be more interesting, if ultimately irrelevant, to see how the lone umpire representative votes.) MLB initially had floated the concept of using a completely electronic strike zone, but it backed off that after receiving player feedback that it’d have too adverse an impact on catchers who make a living off their pitch framing acumen. They’ve tested the challenge system for years in the minors and introduced it to MLB Spring Training this year.

Human umpires will continue to make the vast majority of the ball-strike calls. Each team receives two challenges that would turn to the electronic zone to potentially overrule a call they feel is incorrect. Challenges must be called for in real time by either the hitter, catcher or pitcher. An overturned call does not result in a forfeited challenge. The limit on the number of incorrect challenges encourages players to challenge only if the call is either so egregious that they’re confident they’ll get it overturned or comes on pitches that might be particularly decisive to the outcome of the game.

Additionally, Manfred was noncommittal on when the league had interest in moving forward with a potential change to allow hitters to use bat tracking metrics to challenge check swing calls. The league began testing that with minor league players in the Arizona Fall League last season. It has not been used in any MLB exhibition games. MLB is unlikely to propose it without testing it in big league Spring Training, as they did with the ABS challenge. Manfred suggested that testing might not happen next year because of the more pressing strike zone change.

“We haven’t made a decision about the check-swing thing. … I think we got to get over the hump in terms of either doing ABS or not doing it before you’d get into the complication of a separate kind of challenge involved in an at-bat, right,” he told Drellich. “You think about them, they’re two different systems operating at the same time. We really got to think that one through.”