Well it depends on that certain teams rules. Some teams are just trying to get “a hat on a hat” which is every offensive lineman on a defender and blocking the defender in their play side gap. With sacrificing some vertical movement on the down defensive lineman. So they will shoot straight to backer without the double team. To answer the question more simply though, the lineman will double team until the gap is threatened then come off to the linebacker. Or they will combo block and get some good vertical movement and run into that linebacker reading the play.
How do you know when to double and off vs the guard shooting straight for the backer ?
Well it depends on that certain teams rules. Some teams are just trying to get “a hat on a hat” which is every offensive lineman on a defender and blocking the defender in their play side gap. With sacrificing some vertical movement on the down defensive lineman. So they will shoot straight to backer without the double team. To answer the question more simply though, the lineman will double team until the gap is threatened then come off to the linebacker. Or they will combo block and get some good vertical movement and run into that linebacker reading the play.