There are 22 players of a field at a time, 11 offense and 11 defense.
Canadian football is played with 12 players per team.
I was watching Mexican football, and the winning team had 12 players on the field.
There are 11 players per team on the field at once. 22 players total. 1 football.
There are 11 football players on each team and there is to teams. So all together there are 22 football players on the field and 4 referees.
In regular football the is only eleven players on the field.