John Mara, the 70-year-old president, chief executive officer and co-owner of the Giants, has recently been diagnosed with cancer.

He is undergoing treatment, according to a statement he released Monday afternoon.

“I have recently been diagnosed with cancer and have been following the treatment plan recommended by an outstanding team of doctors,’’ Mara’s statement said . “I’m feeling strong and optimistic, and I’m committed to seeing this through to a positive outcome. I plan to remain active with the team throughout my treatment, and I’m fortunate to be surrounded by incredible support—personally, professionally, and medically. I ask that you respect my privacy and my family’s privacy at this time.”

John Mara revealed in September 2025 he has been diagnosed with cancer. Brad Penner

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