Christy Mathewson died of tuberculosis-related complications in Saranac Lake, New York, at age 45.
Christy Mathewson died on October 7, 1925, in Saranac Lake, New York, succumbing to complications from tuberculosis at the age of 45. His illness was widely believed to have been exacerbated by exposure to poison gas during his service in the Chemical Warfare Service during World War I, which severely damaged his lungs and left him vulnerable to the disease that ultimately claimed his life.
Saranac Lake was, at the time, a renowned center for tuberculosis treatment, and Mathewson spent his final years there seeking treatment while remaining involved in baseball as an executive and commentator. His death, coming just five years after his final professional involvement with the sport, shocked the nation and prompted an outpouring of tributes from players, fans, and sportswriters who had long regarded him as the embodiment of integrity and excellence in baseball.
Mathewson's death occurred more than a decade before the founding of the National Baseball Hall of Fame, yet his legacy was so profound that he was posthumously named one of its first five inductees in 1936. His passing marked the loss of one of the sport's first true national heroes, but his influence on the game's culture, ethics, and popularity endured for generations afterward.