It was pure Namath -outrageous, almost arrogantly confident, blasphemous to old sports hands, a great big nose-thumbing to the establishment. When Joe Namath vowed that the New York Jets, representing the perennially hapless AFL, would beat the NFL s great Baltimore Colts, he was dismissed as a kid quarterback with too much money and not enough humility. After all, the Jets were 18-point underdogs in 1969 s upcoming Third World Championship Game -a Super Bowl that until then had been anyth