My friends, Bob Dylan never sang about pro football but, if he broke into song today, he’d surely bust out a few verses of “The Times They Are A-Changin’” when thinking about today’s NFL. The long-downtrodden Lions are among the league’s best, while the championship-pedigree Patriots are bringing up the rear. New England is joined by one of last year’s darlings, the New York Giants. Offenses, not defenses, seem to win championships. And, rightly or wrongly, running back is one of the most devalued positions in all of sports.