What is pass interference in football?

Pass interference is a penalty that occurs in American football and Canadian football when a defensive player interferes with an eligible receiver's ability to make a catch on a forward pass. This penalty can result in the offensive team being given a first down at the spot of the foul or being awarded a certain number of yards depending on the severity of the interference.

In the NFL, pass interference can be called against both defensive players and offensive players, with different rules and penalties applying to each. Defensive pass interference occurs when a defender makes contact with a receiver while the ball is in the air, preventing them from making a play on the ball. Offensive pass interference occurs when an offensive player interferes with a defender's ability to make a play on the ball.

Pass interference is considered a judgment call by the officials, and can be a very controversial penalty in close or crucial situations. The rules regarding pass interference vary slightly between American football and Canadian football, but the general concept remains the same.