There has never been more disparity across the NFL than this season.A league built on parity has 15 teams with at least six wins and 12 others with three or fewer, the most ever in both categories through 10 weeks.New England (4-5) is the only team in between those two extremes in the AFC, with Chicago (5-5), Minnesota (4-5), Detroit (4-5) and San Francisco (4-6) all residing in the mediocre range in the NFC.The divisions leading the way are the AFC North with the undefeated Pittsburgh Steelers and the NFC West, which both have three teams that have won at least six of their first nine games thanks in part to cross-division matchups with the meek NFC East.There had been only seven instances since the start of the eight-division era in 2002.