The new book “Sweetness: The Enigmatic Life of Walter Payton” by author Jeff Pearlman claims that the all-time great Chicago Bears running back led a very difficult and troubled life after he retired from the NFL. Read more about this story: “Walter Payton a suicidal drug abuser, book says” bit.ly “Walter Payton book paints disturbing picture of Bears legend” (with statement from Payton’s widow, C…