Answer:
11 players:
(Normal Possitions Playing in a 4-4-2 Formation)
1x Goal Keeper
4x Defenders (1x RB- Right Back, 2x CB - Center Backs, 1x LB - Left Back)
4x Midfielders (1x RM - Right Midfield, 2x CM - Center Midfields, 1x LM - Left Midfield)
2x Strikers (CF - Center Foward)
You can get more positions such as:
LWB - Left Wing Back
RWB - Right Wing Back
CDM - Center Defence Midfield
CAM - Center Attack Midfield
LW - Left Wing
RW - Right Wing