Braves adjust rotation after López is scratched with left knee inflammation, with Pérez moved up start

The Atlanta Braves made a late rotation adjustment on Saturday night, scratching Reynaldo López from his scheduled start against the Washington Nationals with left knee inflammation and moving Martín Pérez up to take his place. According to MLB’s game-day report, López was ruled out roughly 50 minutes before first pitch, turning a planned pitching turn into an immediate lineup change for Atlanta.

The timing of the move adds urgency to what has become a defining thread for the Braves this season. With the MLB Trade Deadline approaching, Atlanta’s front office has indicated a clear need for pitching depth, and every late shakeup in the rotation increases the practical value of having additional starters available, whether internally or through trades. Even when the changes are injury-related, they force teams to be more deliberate about roster building.

MLB’s release said López was expected to start Saturday, but that his left knee inflammation caused him to be scratched shortly before game time. With López removed from the plan, Pérez was elevated from a later role to the Saturday assignment. MLB reported that Pérez had been scheduled to start Sunday, meaning the Braves essentially compressed the pitching timeline to cover the immediate need created by López’s absence.

For Atlanta, the decision underscores how thin margins can be when a pitcher’s availability is uncertain. A late scratch does more than change who pitches; it can impact bullpen usage, the pace at which starters are expected to work into games, and how managers manage matchups. When a team has only one scheduled day off the mound, an unplanned pivot can ripple across multiple days, particularly during stretches where every lineup decision carries post-deadline playoff implications.

The Braves also had a motivational component tied to the calendar. MLB noted that the scratch occurred approximately 48 hours before the Monday, 6 p.m. ET Trade Deadline. In practical terms, it meant Atlanta was balancing in-game decisions with deadline planning, including how to evaluate the current rotation in real time while the possibility of adding starters remains on the table.

López’s absence was framed specifically as left knee inflammation. That matters because knee issues can range from minor to lingering, and teams often respond conservatively when discomfort involves weight-bearing mechanics. Without additional team disclosure beyond the scratch reason, the safest approach is to treat this as a short-term availability question that could affect the Braves’ rotation planning beyond the immediate swap.

Pérez’s move up provides a concrete example of what happens when the rotation needs coverage on short notice. Because Pérez was originally slated for Sunday, Atlanta gained an extra start window from the same starting staff, while also shifting the workload that would have gone to the Sunday opener. The next questions for the Braves will be whether Pérez can navigate the higher-stakes Saturday workload and how the Braves adjust their subsequent bullpen usage to maintain fresh arms for the final days of the season before and after the deadline.

For Washington, the replacement changes matchups and at-bats in a way that can matter even when the change is made late. When a starting pitcher is swapped minutes before first pitch, the offense may see a different repertoire, release point, and pace, all factors that hitters prepare for in advance. The Nationals will face the Braves with whatever information they can glean quickly, but the lineup-to-pitcher matchup will be the immediate storyline after López’s scratch.