In American and Canadian football, offensive tackles (OT, T) are a part of the offensive line. Like other offensive linemen, their job is to block: to physically keep defenders away from the offensive player who has the football.

A tackle is the strong position on the offensive line. They power their blocks with quick steps and maneuverability. The tackles are mostly in charge of the outside protection. If the tight end goes out for a pass, the tackle must cover everyone that his guard doesn’t, plus whoever the tight end isn’t covering. Usually they defend against defensive ends. In the NFL, offensive tackles often measure over 6’4” and 300 pounds.