Giants President John Mara Announces Cancer Diagnosis

John Mara, 70, the president, CEO and co‑owner of the New York Giants, announced on Sept. 29, 2025 that he has been diagnosed with cancer and is already following a treatment plan. He said he is feeling "strong and optimistic," plans to remain active with the team throughout treatment, and asked that his and his family’s privacy be respected; the team's statement gave no specifics on the type or stage of the illness. The announcement came a day after the Giants’ 21-18 win over the Los Angeles Chargers. The news arrives amid the Mara family’s pending sale of roughly a 10% stake to the Koch family. Mara has been with the franchise since 1991, became president and CEO in 2005, and helped oversee two Super Bowl victories while serving in prominent NFL leadership roles. Football operations duties have increasingly involved general manager Joe Schoen and head coach Brian Daboll as needed while Mara manages his health and leadership responsibilities.