Professionally? Canadians. And Europe had NFL Europa for a while.
Also for everyone to note!:
IFAF World Championship
So yeah. Japan gave us a run for our money our first year but we were hardly using the best players. We were using graduating seniors who weren't going to the NFL.
Exactly. You assemble a team with Tom Brady, Ed Reed, Ray Lewis, etc and the rest of the world would probably have -500 yards and 0 pts.
Hell you assemble a team with Andrew Luck, Matt Kalil, Trent Richardson, etc and they would do the same.
We're sending a bunch of scrub seniors who have no chance at the NFL at all and still winning.