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Last year, I looked at the worst passing seasons in NFL history as measured by the amount of Adjusted Net Yards each passer produced relative to league average. The worst season of all time — which is heavily influenced by the number of pass attempts a quarterback has — belonged to Blake Bortles in 2014.

Well, in 2018, a rookie Josh Rosen nearly beat him. Rosen averaged just 3.53 ANY/A last year, relative to a leauge average ANY/A of 6.32. That’s 2.79 ANY/A below average, and over 438 dropbacks, that means Rosen produced 1,221 Adjusted Net Yards fewer than league average. He was worse relative to league average than Bortles was in 2014, but since he had fewer attempts, he now comes in with the second least valuable season.

The full list of the 100 worst passing seasons (without pro-rating for games played) is below.

RkQuarterbackYearTeamANY/ALgAvgDropbacksRANY/AValue
1Blake Bortles2014jax3.816.14530-2.33-1234
2Josh Rosen2018crd3.536.32438-2.79-1221
3DeShone Kizer2017cle3.695.91514-2.21-1138
4David Carr2002htx3.245.35520-2.11-1096
5Jake Plummer1999crd2.65.18408-2.59-1055
6Archie Manning1975nor1.384.04387-2.66-1030
7Brock Osweiler2016htx4.346.22537-1.88-1007
8Blaine Gabbert2011jax3.685.9453-2.22-1007
9Bobby Hoying1998phi1.435.31259-3.88-1004
10JaMarcus Russell2009rai2.315.65279-3.34-931
11Jimmy Clausen2010car2.985.73332-2.75-913
12Joe Flacco2013rav4.55.87662-1.37-910
13Kerry Collins1997car2.945.16408-2.22-907
14Ryan Leaf1998sdg1.935.31267-3.38-904
15Vinny Testaverde1988tam3.275.02499-1.75-872
16Ryan Fitzpatrick2008cin3.585.7410-2.13-872
17Jon Kitna2001cin3.765.19606-1.43-867
18Joe Kapp1970nwe0.684.16246-3.47-854
19Kyle Orton2005chi3.25.34398-2.14-852
20Dan Pastorini1981ram-0.125166-5.12-850
21Jack Trudeau1986clt3.054.96446-1.9-849
22Kordell Stewart1998pit3.585.31491-1.73-848
23Jack Jacobs1948gnb0.024.61184-4.59-844
24Jake Plummer2002crd3.865.35566-1.49-844
25Jim Plunkett1972nwe2.154.28394-2.13-841
26Andrew Walter2006rai2.785.38322-2.6-836
27A.J. Feeley2004mia3.445.63379-2.2-833
28Geno Smith2013nyj4.175.87486-1.7-828
29Derek Carr2014rai4.826.14623-1.32-822
30Alex Smith2005sfo1.115.34194-4.23-821
31Chris Weinke2001car3.745.19566-1.45-821
32Dave Brown1996nyg3.35.14447-1.83-820
33Jeff Komlo1979det2.64.61408-2.01-819
34Matthew Stafford2009det3.645.65401-2.01-807
35Terry Bradshaw1970pit0.864.16243-3.3-802
36Vince Evans1981chi3.275459-1.73-793
37Joe Ferguson1984buf2.935379-2.08-788
38Trent Dilfer1995tam3.715.41462-1.7-787
39Rusty Hilger1988det2.695.02337-2.33-785
40Jared Goff2016ram2.826.22231-3.39-784
41Eli Manning2013nyg4.555.87590-1.33-783
42Craig Whelihan1998sdg2.985.31335-2.33-782
43Bob Lee1974atl0.063.91203-3.85-781
44Gary Marangi1976buf0.994.07254-3.07-781
45David Carr2005htx3.775.34491-1.58-774
46Mark Malone1987pit2.855.04354-2.19-774
47Trent Dilfer2007sfo2.375.52246-3.14-773
48Mark Sanchez2012nyj4.365.93487-1.57-766
49Jake Delhomme2009car3.425.65344-2.22-765
50Brett Hundley2017gnb3.715.91345-2.2-759
51Joey Harrington2003det3.865.2563-1.34-754
52Stan Gelbaugh1992sea2.314.88289-2.57-744
53Joe Theismann1985was2.664.86338-2.2-744
54Matt Cassel2009kan4.265.65535-1.38-741
55Ryan Lindley2012crd1.895.93183-4.04-740
56Dan Pastorini1973oti1.583.89320-2.31-739
57Kyle Boller2004rav4.165.63499-1.47-734
58Akili Smith2000cin2.815.21303-2.39-726
59Charlie Frye2006cle3.725.38437-1.66-724
60Kelly Stouffer1992sea1.544.88216-3.34-722
61Carson Wentz2016phi5.096.22640-1.12-720
62Jeff George1991clt3.865.18541-1.32-716
63Randy Hedberg1977tam-3.213.55105-6.76-709
64Steve DeBerg1978sfo1.834.03319-2.2-701
65Joe Namath1976nyj1.224.07246-2.85-700
66Ryan Leaf2000sdg3.225.21353-1.98-700
67Mike Phipps1973cle1.863.89343-2.03-696
68Joe Flacco2017rav4.715.91576-1.2-691
69Drew Bledsoe1995nwe4.375.41659-1.05-689
70Dennis Shaw1971buf1.813.93324-2.12-686
71Steve Fuller1979kan2.384.61307-2.23-685
72Kim McQuilken1976atl-0.94.07138-4.96-685
73Bubby Brister1995nyj1.745.41186-3.67-683
74Josh Allen2018buf4.376.32348-1.95-679
75Donovan McNabb1999phi2.415.18244-2.77-675
76Rick Mirer1995sea3.855.41433-1.56-674
77Troy Aikman1989dal3.095.24312-2.15-672
78David Archer1985atl2.974.86355-1.89-671
79Greg Landry1969det1.154.67190-3.52-668
80Derek Anderson2009cle2.195.65193-3.46-667
81Josh McCown2014tam4.36.14363-1.84-666
82Josh Freeman2011tam4.765.9580-1.14-664
83Mike Phipps1975cle2.094.04341-1.95-664
84Bobby Douglass1969chi1.094.67185-3.58-662
85Mark Rypien1993was3.165.11335-1.96-656
86Rick Mirer1993sea3.895.11533-1.22-653
87Cliff Stoudt1983pit3.495432-1.5-650
88Blake Bortles2016jax5.236.22659-0.98-649
89Boomer Esiason1992cin2.74.88297-2.18-648
90Bobby Douglass1971chi1.393.93255-2.54-648
91Randall Cunningham1986phi2.664.96281-2.3-646
92Tobin Rote1959det0.654.59162-3.93-637
93Marc Bulger2008ram4.385.7478-1.33-634
94Hugh McCullough1940crd-2.92.55116-5.45-632
95Vinny Testaverde1991tam3.455.18361-1.74-627
96Sam Bradford2010ram4.735.73624-1-624
97Rick Norton1969mia0.484.23166-3.76-624
98Marc Bulger2007ram4.025.52415-1.5-621
99Richard Todd1976nyj0.824.07191-3.24-619
100Ronnie Cahill1943crd-2.543.12109-5.66-617
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