based on your list, andy dalton needs to be lower
hes below average at best
based on statlines, mariota, manning, trubisky, and JAMEIS WINSTON all had better seasons
all had a higher QBR and way higher completion percentage
QBR:
trubisky: 95.4
manning: 92.4
mariota: 92.3
winston: 90.2
dalton: 89.6
completion percentage:
mariota: 68.9
trubisky: 66.6
manning: 66.0
winston: 64.6
dalton: 61.9
passing touchdowns:
trubisky: 24
manning: 21
dalton: 21
winston: 19
mariota: 11
interceptions:
winston: 14
trubisky: 12
dalton: 11
manning: 11
mariota: 8
the only thing dalton is average at is not throwing interceptions