22
Five per team.
11 on the feild
That 'C' on a player's jersey indicates the player is one of the captains of the team. Almost always in the NFL, a team's starting quarterback is one of the captains of the team.
24
it is about 27
4 players play at one time, but there is a fifth backup player
25 on the team. 9 on the field
yes
That depends on the sport.
15
700