A term for the overuse of diagnostic imaging performed to 'rule out' pathology for which there is a low clinical suspicion. Defensive imaging is meant to reduce the risk of a lawsuit for a potentially treatable condition, such as indiscriminant CTs of the head for any minor bump to exclude subdural haematoma
And there is video, too, of Dixon's rehabilitation, and of the quarterback breaking down defensive film, to show he isn't some spread-option gimmick limited to reading only small chunks of the field.