On running plays, offensive linemen try to "climb" to the second level. This means after an initial double-team or chip block on a defensive lineman, one blocker releases to engage a linebacker. If the offense successfully reaches the second level, the running back often gains 10+ yards because the primary tacklers (linebackers) are being obstructed. 3. Defensive Counter-Strategies
A defense that protects its second level is usually elite against the run. If linebackers are forced to fight off 300-pound linemen all game, they will eventually wear down, leading to "explosive" run plays where the back reaches the safety (third level) untouched. 3 : Defense and Reaching Second Level
Linebackers must "scrape" laterally. This involves reading the play and moving horizontally to avoid the climbing blockers, keeping themselves "clean" to make a play on the ball carrier. 4. Why It Matters On running plays, offensive linemen try to "climb"