The author of this book tackles the subject of comparing quarterbacks from different eras by developing an unbiased methodology to identify the best. Since changes in the game have affected the statistical significance of performance metrics, the author redefines the QB passer rating into four new comprehensive metrics. First, the effect of stat inflation is corrected. Second, the missing dimensions of the quarterbacking position, such as running and sack avoidance, are incorporated. Third, the quarterbacks' winning record is taken into account. Last, the fourth metric combines the first three, to assess the total value of the QB performance. With these factors on hand, the author makes an impartial case for the ranking and rating of the top quarterbacks in the modern era of football.