[Ref in PA]

A blocking foul can be committed by the offense or defense. Most often it is committed by the defense. Illegal screens are blocking fouls committed by the offense. Rarely is it ever committed by the offensive player with the ball. However, you described a situation where a blocking foul could be committed by the player with the ball (pivoting into the path of a defensive player). Just because you have the ball does not give you the right to pivot over the top of people or step into defenders as they pass.