By definition, the game we love so much is driven almost exclusively by offense — sorta like the Lions — with only one of eight or nine slots typically reserved for a team defense. Often selected in the last round or two of the draft, many players tend to view defenses as interchangeable on a weekly basis, based on matchups and which units are trending upward. At the top of the heap were the ball-hawking Chiefs, whose eight-turnover, two-touchdown, three-point-yielding pummeling of the Jets produced enough points to offset a career day by the weekend’s top fantasy wideout, Marvin Jones. The Vikings continued their early-season dominance by sacking Cam Newton eight times — one of which was a safety — picking him off thrice, taking a punt return to the house and holding one of the NFL’s top offenses to 10 stinking points. The Bills picked off Carson Palmer four times, sacked him five times and returned a botched field-goal try for a score. Two rookie quarterbacks — Wentz and Dak Prescott — are raising eyebrows across the league, but only Wentz looks like someone you can count on for consistent fantasy production. Like Prescott, he has yet to throw an interception; but unlike the Cowboys’ QB, Wentz has thrown TD passes in each game (five total). Jeremy Langford was carted off the field Sunday night with a possible Achilles injury, leaving the backfield in the promising rookie’s hands.