The author of this article did a follow-up post in which he compared individual players before, during and after playing for the Patriots, and found very suspic

The author of this article did a follow-up post in which he compared individual players before, during and after playing for the Patriots, and found very suspicious trends. On average the players were only good at fumbles when they were playing for New England. Of course, one can still argue that Belichick's focus on fumbling is only effective during the time that players are employed by New England, but you'd still expect to see SOME carryover to players' later teams if only because of whatever good habits they picked up playing for NE. http://www.sharpfootballanalysis.com/blog/2015/new-england-patriots-fumble-more-often-when-playing-for-other-teams http://www.sharpfootballanalysis.com/blog/2015/new-england-p...