Here's what the issue boils down to, folks: If someone told you that the quarterback with the highest passer rating in the league was in a high-scoring, high passing volume shootout with another team, would you expect the QB with the highest passer rating in the league would have a good chance of winning that game? If you knew nothing else about that quarterback, your answer would likely be yes, and in fact it should be yes. However, if you knew the quarterback was Ryan Tannehill, then your answer should be no. And that isn't true for quarterbacks like Mahomes, Brees, and Wilson, despite that their passer ratings were lower than Tannehill's in 2019. In other words, Ryan Tannehill's 2019 passer rating isn't predictive of his performance in high-volume passing games, like the passer ratings of Mahomes, Brees, and Wilson are. So what does that mean? Well it means that for Ryan Tannehill to play like he did in 2019, his team has to limit his passing volume, and it therefore needs personnel ingredients that Mahomes, Brees, and Wilson's teams don't need, such as, number one, a bell cow running back who can shoulder the offensive load and play extremely well under those conditions. So the point is that Tannehill is dependent on his surroundings, whereas the other QBs noted above are not.