What is the penalty for an illegal block in the back?

The penalty for an illegal block in the back is 10 yards. This infraction occurs when a player contacts an opponent from behind and at or above the waist during a block, which is considered dangerous and not in line with sportsmanship. The 10-yard penalty reflects the seriousness of this foul, as it helps maintain player safety and fair play. Enforcing such penalties is crucial for promoting responsible playing techniques and discouraging actions that could lead to injuries.