Might have been Nick Du Toit

The yanks were never too good at tackling. IIRC we had a couple of US gridiron players came to Wigan in the 1950s. They were woeful. Lasted a couple of games between them. They soon went back home.

Chuck Wiseman in the 60's.

Thought the Ben Barba and David Mead's tries this year were amazing but the NFL player was unbelievable.

I watched a union game (I think) a few years back and a player took the ball as first reciever behind the scrum and ran up and over the top of it!

That would've been the United Kingdom in Methley which is between Leeds and Cas. He converted it into flats quite a number of years ago though IIRC.