John Hendrickson, the 59-year-old widower of philanthropist Marilou Whitney, passed away suddenly in Saratoga Springs, New York. Known for his dedication to horse racing and community service, Hendrickson continued his late wife's philanthropic legacy by establishing a medical clinic for backstretch workers and supporting various charitable initiatives. He served as chairman of the National Museum of Racing and Hall of Fame since 2017 and was instrumental in projects that improved conditions for horse stable employees. Hendrickson had recently put their mansion, Cady Hill, on the market for $16 million. His contributions to the Saratoga community included the Backstretch Appreciation Program and efforts to modernize the museum. His sudden death in the racing season has left the community mourning the loss of a prominent figure.