Why John Mayer Has Donated Millions to PTSD Research for Veterans
John Mayer performs onstage at the 2025 MusiCares Persons of the Year Benefit Gala for Grateful Dead held at the Los Angeles Convention Center on Jan. 31, 2025, in Los Angeles. Michael Buckner/Billboard Beyond his chart-topping melodies and guitar virtuosity, John Mayer has quietly dedicated himself to a deeply personal mission: funding critical research and...









