Astros pitcher Brandon Walter underwent UCL reconstruction surgery, sidelining him for the entire 2025 season, while John Rooney had a less severe procedure to remove bone spurs and address tennis elbow, potentially allowing him to return for Spring Training. Walter, who had shown promise with a 3.35 ERA in nine starts, missed the entire 2024 season due to a rotator cuff injury, whereas Rooney made his MLB debut in August after a solid Triple-A performance.
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