Saints have had the easiest schedule this season so far

When you look at the fumble variable, they are actually removing it, so that teams are viewed equally with regard to fumble recoveries (no relation to being the fumbler). They do this due to the fact that the benefit a team has derived from recovering fumbles is not indicative of their success in recovering future fumbles. So, for instance if a team has recovered 95% of fumbles in the past, they would apply a decrement (45%) in order to push that down to 50% to provide a truer picture of how good that team is without regard to luck.