Mahomes and Allen are elite. Tua is getting there. Hurts may already be there. Burrow looked good recently (until last night). Dak has actually started to look good again. But yeah, slim pickings beyond those guys.
Lamar Jackson seems to have tailed off as well.
Looking at QBR ratings this season, only 3 are over 70 (Mahomes, Allen, and Tua).
I think of Allen as a generation behind Mahoney. Lamar is the only around the same age preforming well.
