New York Giants co-owner, president and CEO John Mara revealed Monday that he has been diagnosed with cancer but plans to continue his duties with the team while undergoing treatment.
In a statement released by the team, Mara said, “I have recently been diagnosed with cancer. 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 … I ask that you respect my privacy and my family’s privacy at this time.”
The New York Giants president did not disclose the specific type or stage of cancer.
Mara’s announcement came just one day after the Giants secured their first win of the 2025 season — a 21–18 victory over the previously undefeated Los Angeles Chargers. Despite his diagnosis, Mara’s involvement with the team has not wavered, and he stated that he is being supported “personally, professionally and medically” as he begins treatment.
Mara is a third-generation member of the family that founded the Giants in 1925. He took over as president of the franchise following the death of his father, Wellington Mara, in 2005. Under his leadership, the Giants have won two Super Bowl championships, in the 2007 and 2011 seasons.
Reactions from around the league were heartfelt. Former Giants head coach Tom Coughlin and many current and former players offered words of support. “Sending strength, support, and prayers to John Mara. Your leadership and grit inspire everyone around you,” Coughlin said. “No one fights cancer alone. It takes a team and always proud to be on yours.”
Former Giants defensive end Osi Umenyiora spoke of Mara’s compassion towards him during his injury in the 2008 season.
“Only one person from the Organisation came to the hospital to see me. John Mara,” Umenyiora wrote via tweet on X. “I couldn’t believe it was him, I just started crying. And he just sat there until I fell asleep. Didn’t say a word. He will beat this for sure.”
Though the news was unexpected, Mara’s message showed resilience and unwavering determination. As he faces this personal challenge, he has made it clear: he will remain a constant presence in the Giants organization — just as he has for years.
