CHARLIE EBERSOL WOKE up in his San Francisco apartment just after 6:45 a.m. on April 2, his phone buzzing. He was running on four hours of sleep, as he had for months. In the previous two years, he had gotten married, become a father, founded America's newest professional football league and overseen the hiring of more than 1,000 employees. His assistant scheduled his day in 7½-minute increments. He was 36 years old, with an easy smile under warm eyes, the filmmaker son of Dick Ebersol, one of television's most celebrated and influential executives during his career at NBC, and Susan Saint James, the famed actress and activist.