The MLB automated ball-strike challenge system is doing exactly what it was designed to do, correct missed calls in real time. But in doing so, it is also putting umpires under a kind of spotlight they have rarely faced so directly, and C.B. Bucknor found himself squarely in the center of it.
A Strike Zone Put on Display
During Cincinnati’s 6-5 win over Boston, Bucknor’s strike zone became part of the game’s narrative rather than its background. Eight of his calls were challenged. Six were overturned. The numbers alone were striking, but the timing and visibility of those reversals made the situation impossible to ignore. Each challenge paused the action, each review delivered a verdict, and each correction drew a reaction from the crowd that made the moment linger longer than a typical missed call ever would.
The system does not argue or interpret; it simply measures and returns an answer. That clarity is useful for players and fans, but it leaves little room for ambiguity when a call is wrong.
The Suarez Sequence That Shifted the Game’s Rhythm
The sixth inning delivered the most memorable stretch. Eugenio Suarez was called out on strikes on two consecutive pitches. Both times, he immediately challenged. Both times, the system overturned the call. What would normally be a routine strikeout instead turned into a repeated interruption, with the crowd growing louder after each reversal.
Suarez stayed in the at-bat long enough to put the ball in play, eventually grounding out to second. The inning still ended, but the sequence changed the tempo. Instead of a quick out, it became a drawn-out examination of the strike zone, played out in real time.
When the Challenges Run Out
Later in the game, the system’s limits became just as visible. Boston’s Trevor Story was called out on a pitch that appeared outside the zone, but the Red Sox had already used and lost their earlier challenges. With no challenges remaining, there was no review.
Story reacted immediately, and manager Alex Cora followed, leaving the dugout to argue and getting ejected. The contrast with earlier moments was sharp. In one case, incorrect calls were overturned within seconds. In another, a similar situation stood simply because the team had no challenges left.
MLB Teams begin with two challenges and retain them only if successful. That structure introduces strategy, but it also guarantees that some missed calls will remain untouched.
Saturday’s game showed how the ABS system reshapes accountability. Missed calls are no longer just part of the flow—they are isolated, reviewed, and either confirmed or corrected in full view. For umpires, that means every borderline pitch carries the possibility of immediate verification, and every mistake risks becoming a moment that defines the game’s conversation.
