Each NFL team uses just one quarterback per game (ideally) and the incidence of producing one of the best eight games allowed by a defense is less difficult than the other fantasy positions that employ several players in the same position per game.
Below shows how often a player logged the best game allowed by a secondary (Top-1), one of the four best performances allowed (Top-4), and one of the best eight performances (Top-8). With 17 games played, a Top-8 game is “above average” among the best quarterbacks from each opponent. Notable too is that players only face 14 teams per year, three division mates are played twice and cannot give them more than one “Top-1.”
The “Better than Average” (BTA) score is a weighting of those games.
