Perhaps a better way for me to word it would be essentially as a kick returner( is gunner a term they use for this position ) his natural talent for seeing an opening and exploiting it as the play develops should stand him in good stead
If he s to be used as a receiver then as you say quite...
The evasiveness required is generally a talent you are born with
The rugby background should make the transition smooth
It’s more a question of his athleticism being of a high enough level to compete in the NFL
Best of luck to the lad