Monday Night Football returned last night (Sept. 12) which a surprisingly tight game between the Seattle Seahawks & Denver Broncos. It aired on ABC, ESPN & ESPN2, and was watched by 19.8 million with a 5.59 cumulative rating among 18-49 year olds. Everyone knew the NFL would take a big chunk out of Raw’s numbers. And it did. WWE’s Mon., Sept. 12 episode was watched by an average of 1.71 million over its three hours. That’s a 16.5% drop from the week before with no football. It scored a .44 average rating with the key demo, 24% less than Sept.…