Section 35 Team A and B, Offense and DefenseOFFENSE AND DEFENSEArticle 1Whenever a team is in possession (3-2-7), it is the Offense and, at such time, its opponent is theDefense.TEAM A AND TEAM BArticle 2The team that puts the ball in play is Team A, and its opponent is Team B. For brevity, a player ofTeam A is referred to as A1 and his teammates as A2, A3, etc. Opponents are B1, B2, etc.OFFICIAL NFL PLAYING RULES 13Note: A team becomes Team A when it has been designated to put ball in play, and it remains Team A until adown ends, even though there might be one or more changes of possession during the down. This is incontrast with the terms Offense and Defense. Team A is always the offense when a down starts, butbecomes the defense if and when B secures possession during the down, and vice versa for each changeof possession.Article 3A change of possession occurs when a player of the defensive team secures possession of a ballthat has been kicked, passed, or fumbled by a player of the offensive team, or when the ball is awarded tothe opposing team by rule. A change of possession includes but is not limited to:(a) an interception of a forward pass; or(b) a catch or recovery of a fumble or backward pass; or© a catch or recovery of a Scrimmage Kick, Free Kick, or Fair Catch Kick.(d) when the offensive team fails to reach the line to gain on fourth down.(e) when the offensive team misses a field-goal attempt.