What is a chop block in football?

A chop block is an illegal blocking technique in football that involves two offensive players executing a coordinated block against a defensive player. One offensive player engages the defensive player high while the other blocks low, usually targeting the defender's knees or lower legs.

Here are some key points about chop blocks in football:

1. Illegality: Chop blocks are considered illegal in both college and professional football due to the risk of serious injury to the defender's knees and legs. The technique can lead to severe knee injuries, including tears in the anterior cruciate ligament (ACL), medial collateral ligament (MCL), or meniscus.

2. Intent: Chop blocks are typically executed with the intention of neutralizing or taking down a highly skilled or aggressive defender. By targeting the defender's lower body, the offensive players aim to disrupt their balance, mobility, and ability to make plays.

3. Penalty: If a chop block is executed, it results in a penalty assessed against the offending team. In the National Football League (NFL), the penalty is 15 yards from the spot of the foul. In college football, it is a 15-yard penalty or half the distance to the goal, depending on the location of the foul.

4. Offensive Line Limitations: In the NFL, chop blocks are illegal for all players, except for the interior offensive linemen (center, guards) when operating within a specific zone. However, offensive tackles and eligible receivers are not allowed to chop block at any moment.

5. Safety Concerns: Chop blocks are banned primarily for player safety reasons. The defense is particularly vulnerable during chop blocks, as the blocking player strikes at the lower body when the defender's attention is often focused on the higher block. This can lead to dangerous and career-threatening injuries.

6. Proper Technique: Legal blocks in football rely on proper body position and leverage. Offensive linemen are taught to engage defenders with their hands, using their upper bodies instead of going low for a chop block. Proper technique emphasizes blocking opponents with chest and shoulders, keeping the hands inside and not targeting below the waist.

7. Defensive Countermeasures: Defenders are trained to recognize incoming chop blocks and respond accordingly. Techniques include spin moves, swim moves, or using their hands to avoid low blocks and maintain balance. Defensive players are also encouraged to report any illegal or unsafe blocking techniques to officials.

In summary, chop blocks are illegal in football due to the associated safety risks and potential for severe knee injuries. The penalty for executing a chop block generally results in a 15-yard penalty and is aimed at maintaining player safety and fairness within the game.