I personally think guys like Kaepernick, RG3, Cutler and Bradford are the "bottom tier" and Tannehill, Dalton and Foles are the second tier guys. Foles has already made the playoffs with Mccoy and a worse defense. Dalton makes the playoffs every year with a team thats far inferior to the Bills at least on paper (although, he doesnt exactly play like a star QB). Tannehill is mediocre for sure, but definitely has potential to be a top ten QB. Kaepernick, RG3, Cutler and Bradford are all bums. They all have had success at some point, but they either are injury prone (Bradford/RG3), or are divas (Kap/Cutler), and the years where they were unsuccessful, they straight up sucked.