Gridiron groups are teams of players that compete in the sport of American football. The term 'GRIDIRON' is used to refer to the playing field, which is marked with a grid-like pattern. Teams typically consist of 11 players on offense and 11 players on defense. Each team is led by a head coach and supported by assistant coaches and other staff members. GRIDIRON groups compete against each other in regular season games and playoffs, with the ultimate goal of winning a championship.