Marv Levy is back in football and feels like a newcomer. Referring to himself as "an 80-year-old rookie," the Hall of Fame coach returned to the Buffalo Bills franchise he led to an unprecedented four straight Super Bowl appearances in the 1990s, eagerly accepting the position of general manager Thursday. "My enthusiasm is unbounded," Levy said. "It's not just to get back into the mainstream of the football world but to do it with the Buffalo Bills, for whom I have such a longtime affection."