It stands for snapper. The long snapper for punts and field goals.
KR = Kick Returner
line backer or left back if you are in the UK
The positions in Arena Football are the same in NFL football
Sn stands for the element tin in the periodic table.
tin
pART OF THE SN
In chemistry, "Sn" stands for the element tin. Tin is a metallic element with the atomic number 50.
All of the same as in pro football
6 differant positions
set notation. or side-note, if the sn is found in a reference book and has informative text following it.
ends
the player positions and the field!