Ключевые слова: afc, american, athlete, athletic, attack, back, ball, championship, coach, college, competition, defense, field, football, fun, game, goal, grass, green, guard, helmet, kick, league, line, man, match, national, nfc, nfl, offense, outdoor, people, play, player, playoff, practice, quarterback, recreation, round, run, sport, team, teamwork, throw, touchdown, train, training, workout, yard, yards,