The field for the upcoming 2025 Home Run Derby underwent a late-hour change Saturday, as Matt Olson of the host Atlanta Braves was announced as a replacement for teammate Ronald Acuña Jr., who will no longer participate.

MLB Announces Change After Ronald Acuna Jr. Injury News originally appeared on Athlon Sports. Superstar right fielder Ronald Acuna Jr. is in his eighth major-league season as an Atlanta Brave after making his MLB debut in 2018 and winning National League Rookie of the Year.

Matt Olson is set to replace his Atlanta Braves teammate, Ronald Acuña Jr., in the 2025 MLB All-Star Home Run Derby.

Atlanta Braves outfielder Ronald Acuna Jr. now has a limited itinerary for the upcoming MLB All-Star festivities. Acuna has officially been removed from the Home Run Derby, which is scheduled for Monday, July 14 in Atlanta. He has competed in the event before, reaching the semifinals in 2019 and the quarterfinals in 2022.