from http://www.espn.com/blog/philadelphia-eagles/post/_/id/26276/going-for-it-eagles-success-leads-to-a-more-aggressive-minded-nfl
Dating back to 2002, there had been only one instance of a team going for two while down eight points. Then it happened twice in three weeks.
It’s just further evidence of a sea change occurring across the NFL where teams are ratcheting up their level of aggressiveness, brought on by a perfect storm of circumstance that includes a rise in analytics, the enforcement of rules that (further) benefit the offense, and an Eagles Super Bowl run that was defined by an attacking, out-of-the box approach.
According to ESPN Stats & Information and Elias research:
There have been 59 two-point conversion attempts so far this season, which is the most through Week 7 since the rule was instituted in 1994.
Teams have gone for two points in the first half 12 times, the most through Week 7 since at least 2001. The previous high in that span was seven.
Fourth-down tries are also on the rise. Teams have gone for it on fourth down 200 times. That’s the second-most fourth-down conversion attempts through Week 7 since at least 1991.
And despite this being the second-highest rate of fourth-down tries since at least 1991, the league is converting fourth downs 53.5 percent of the time this season, which is the best rate through Week 7 since 2012