What happened: During the third inning of Sunday's matchup between the Pittsburgh Pirates and Atlanta Braves, a called fourth ball on Pirates shortstop Jared Triolo was challenged by the Braves. The Statcast-powered Automated Ball-Strike (ABS) system verified the umpire's original decision, confirming the walk and allowing Triolo to take first base.

Why it matters: The challenge system, a central feature of the 2026 MLB season, requires teams to use their two allotted challenges strategically. By unsuccessfully challenging Triolo's walk, the Braves lost a challenge in a game that has already seen multiple ABS interventions, including a successful strikeout overturn against Bryan Reynolds. This high-tech officiating continues to play a pivotal role in high-leverage plate appearances and overall game management.

What to watch: The Pirates and Braves will conclude their series at Truist Park, with both clubs closely monitoring their available challenges as the ABS system remains a decisive factor in close divisional races.