The offensive line, or “OL,” and other players on the field for your team when you start a set of downs with the ball, are collectively called the offense. This is sometimes abbreviated as “O.”
Whether you play youth football or in the NFL (National Football League), the positions on a football team are the same. There can only be 11 players from one team on the field during plays.
The defensive line, or “DL,” and other players on the field for your team when you don’t have the ball at the start of a play are collectively called the defense. This is often abbreviated as the “D.”