 Williams continued his involvement in the Jimmy Fund, later losing a brother to leukemia, and spending much of his spare time, effort, and money in support of the cancer organization.In his later years Williams became a fixture at autograph shows and card shows after his son (by his third wife), John Henry Williams, took control of his career, becoming his de facto manager.The younger Williams provided structure to his father's business affairs, exposed forgeries that were flooding the memorabilia market, and rationed his father's public appearances and memorabilia signings to maximize their earnings.