Dallas Cowboys owner Jerry Jones said he quietly battled stage 4 melanoma for more than a decade and is now cancer-free. The 82-year-old told the Dallas Morning News his diagnosis was made in June 2010 and that he had kept the illness private until now. Jones said treatment at Houston’s MD Anderson Cancer Center included four surgeries—two on his lungs and two on his lymph nodes—and participation in a clinical trial of a PD-1 checkpoint-inhibitor drug that he credits with saving his life. “I now have no tumors,” he said. The disclosure comes ahead of next week’s debut of the Netflix docuseries “America’s Team: The Gambler and His Cowboys,” in which Jones briefly references his medical ordeal. Jones purchased the Cowboys in 1989 and has overseen their rise to an estimated $12.8 billion valuation, the highest in global sport.