The Atlanta Braves announced that star outfielder Ronald Acuna Jr. will miss the remainder of the season after tearing the anterior cruciate ligament in his left knee in Sunday's win over the Pittsburgh Pirates.

Acuna, the 2023 National League MVP, was injured attempting to steal third base in the first inning of Atlanta's 8-1 victory. Though he was able to walk off the field under his own power and the Braves initially termed the injury as left knee soreness, subsequent tests revealed a complete tear of the ACL that will require surgery at a yet-to-determined date.

The four-time All-Star previously tore the ACL in his right knee on July 20, 2021 and missed the remainder of that season, as well as the Braves' first 19 games of the 2022 season.

“I saw the catcher throwing the ball back to the pitcher very slow,” Acuña told reporters afterward. “I was timing that so I could steal third. But in that moment, he threw it hard. So I had to come back, and that’s when I felt (his knee buckle).

OF Ronald Acuña Jr. tonight underwent an MRI that revealed a complete tear of the ACL in his left knee. He is set to undergo surgery at a date yet to be determined and will miss the remainder of the 2024 season.

— Atlanta Braves (@Braves) May 27, 2024

Acuna unanimously won the NL's MVP award with a monster 2023 campaign in which he became the first player in Major League Baseball history to record 40 home runs and 60 stolen bases in a season. The 26-year-old led the majors in stolen bases (73) and runs scored (149), ranked second with a .337 batting average, and produced 41 homers and 106 RBIs in 159 games.

Though Acuna's numbers were down so far in 2024, he still entered Sunday's game tied for fourth in the majors with 16 stolen bases. The 2018 NL Rookie of the Year was hitting .250 with four homers and 15 RBIs in 49 games at the time of the injury.

Atlanta, which has won the last six NL East titles, is already dealing with another season-ending injury to a top player with ace pitcher Spencer Strider undergoing surgery in April to repair a torn ulnar collateral ligament in his right elbow. 

The Braves are currently six games behind the first-place Philadelphia Phillies in the division standings.