“This is an example of a defensive foul, with the defender using an illegal forearm below the free throw line extended. The on-ball defender, Zion Williamson, extends his forearm, and he initiates contact to the front of the driving offensive player, Kawhi Leonard. This contact is illegal whether or not it disrupts the offensive player’s speed, quickness, balance or rhythm. Outside the Lower Defensive Box and below the free throw line extended, forearm contact by an on-ball defender is legal only when it is made to the back of an offensive player with the ball, that is not the case here, and this is a defensive foul.”