Each football team has three units - Offense, defense, and special teams (kickoff, punting, field goals, etc). When teams are required to shift units (turnover,

Each football team has three units - Offense, defense, and special teams (kickoff, punting, field goals, etc). When teams are required to shift units (turnover, score, kickoff) there's a short official break for them to switch units and get onto the field.