NFL football is a sport where it is often difficult to link causation and results with any confidence or accuracy. Twenty-two men are flying around the field on every play, most of them bashing into one another in a choreographed 4-second explosion of violent intent, with each man responsible for his own play, but all 11 on one side of the ball expected to perform as an integrated unit amid the chaos.
Separating out good individual performances from bad is difficult for fans due to a lot of limitations. For one thing, few fans have the opportunity to see all 22 players on the video screen at the same time.