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Diamondbacks Ace Corbin Burnes to Undergo Season-Ending Tommy John Surgery

Surgery to reconstruct a torn ulnar collateral ligament threatens to keep him sidelined through late 2026.

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Corbin Burnes #39 of the Milwaukee Brewers during the 91st MLB All-Star Game at Coors Field on July 13, 2021 in Denver, Colorado
Corbin Burnes walks off the field after feeling discomfort in his right elbow against the Washington Nationals.

Overview

  • Burnes exited his June 1 start with elbow discomfort after posting a 2.66 ERA and 63 strikeouts over 11 starts this season.
  • The procedure carries a 12- to 18-month recovery window, jeopardizing his availability for most, if not all, of the 2026 campaign.
  • Right-hander Ryne Nelson, who excelled in a swing role last season, is set to fill Burnes’s spot in Arizona’s rotation.
  • This marks the third major arm injury to one of the Diamondbacks’ big-ticket free-agent pitchers following setbacks to Eduardo Rodriguez and Jordan Montgomery.
  • With the team at .500 and 6.5 games behind the NL West lead, Arizona faces pressure to reinforce its rotation through internal promotions or trade-deadline moves.