4 quarterbacks are tied for the highest passing touchdown percentage by a quarterback in a season, at 100.0 percent. The first three are Tommy Maddox in 1993, Guido Merkens in 1985 and Chuck Fusina in 1981.
| NAME | TD% | SEASON | TM | GP | CMP | ATT | PCT | YDS | AVG | YDS/G | TD | INT | RTG | INT% | SCK | SCKY | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | T. Maddox | 100.0 | 1993 |  DEN | 16 | 1 | 1 | 100.0 | 1 | 1.0 | 0.1 | 1 | 0 | 118.8 | 0.0 | 0 | 0 |
| 2 | | G. Merkens | 100.0 | 1985 |  NO | 16 | 1 | 1 | 100.0 | 7 | 7.0 | 0.4 | 1 | 0 | 135.4 | 0.0 | 1 | 10 |
| 3 | | C. Fusina | 100.0 | 1981 |  TB | 4 | 1 | 1 | 100.0 | 2 | 2.0 | 0.5 | 1 | 0 | 118.8 | 0.0 | 0 | 0 |
| 4 | | R. Kirkman | 100.0 | 1935 |  PHI | 1 | 1 | 1 | 100.0 | 1 | 1.0 | 1.0 | 1 | 0 | 118.8 | 0.0 | ||
| 5 | | N. Sudfeld | 50.0 | 2018 | PHI | 2 | 1 | 2 | 50.0 | 22 | 11.0 | 11.0 | 1 | 0 | 129.2 | 0.0 | 0 | 0 |
| 6 | | C. Conklin | 50.0 | 1992 |  WAS | 1 | 2 | 2 | 100.0 | 16 | 8.0 | 16.0 | 1 | 0 | 139.6 | 0.0 | 0 | 0 |
| 7 | | K. Ingram | 50.0 | 1987 | NO | 2 | 1 | 2 | 50.0 | 5 | 2.5 | 2.5 | 1 | 0 | 95.8 | 0.0 | 1 | 6 |
| 8 | | T. Sherman | 50.0 | 1969 | TOT | 5 | 2 | 2 | 100.0 | 20 | 10.0 | 4.0 | 1 | 0 | 147.9 | 0.0 | 0 | 0 |
| 9 | | B. Waters | 50.0 | 1960 |  SF | 8 | 2 | 2 | 100.0 | 61 | 30.5 | 7.6 | 1 | 0 | 158.3 | 0.0 | ||
| 10 | | B. Clatterbuck | 50.0 | 1957 |  NYG | 1 | 2 | 2 | 100.0 | 39 | 19.5 | 39.0 | 1 | 0 | 158.3 | 0.0 | ||
| 11 | | G. Kerkorian | 50.0 | 1956 |  BAL | 3 | 2 | 2 | 100.0 | 59 | 29.5 | 19.7 | 1 | 0 | 158.3 | 0.0 | ||
| 12 | | M. Willis | 33.3 | 2025 |  GB | 2 | 3 | 3 | 100.0 | 13 | 4.3 | 6.5 | 1 | 0 | 124.3 | 0.0 | 0 | 0 |
| 13 | | V. Testaverde | 33.3 | 2006 |  NE | 3 | 2 | 3 | 66.7 | 29 | 9.7 | 9.7 | 1 | 0 | 137.5 | 0.0 | 0 | 0 |
| 14 | | S. Matthews | 33.3 | 2004 |  BUF | 3 | 2 | 3 | 66.7 | 44 | 14.7 | 14.7 | 1 | 0 | 149.3 | 0.0 | 0 | 0 |
| 15 | | B. Quarles | 33.3 | 1987 |  RAM | 1 | 1 | 3 | 33.3 | 40 | 13.3 | 40.0 | 1 | 1 | 81.9 | 33.3 | 0 | 0 |
| 16 | | J. Rutledge | 33.3 | 1986 | NYG | 16 | 1 | 3 | 33.3 | 13 | 4.3 | 0.8 | 1 | 0 | 87.5 | 0.0 | 0 | 0 |
| 17 | | B. Masterson | 33.3 | 1934 |  CHB | 9 | 3 | 3 | 100.0 | 39 | 13.0 | 4.3 | 1 | 0 | 158.3 | 0.0 | ||
| 18 | | R. Collier | 28.6 | 1987 |  PIT | 2 | 4 | 7 | 57.1 | 110 | 15.7 | 55.0 | 2 | 1 | 101.8 | 14.3 | 1 | 3 |
| 19 |  | T. Romo | 25.0 | 2016 |  DAL | 1 | 3 | 4 | 75.0 | 29 | 7.3 | 29.0 | 1 | 0 | 134.4 | 0.0 | 0 | 0 |
| 20 | | B. St. Pierre | 25.0 | 2009 |  ARI | 1 | 2 | 4 | 50.0 | 12 | 3.0 | 12.0 | 1 | 1 | 56.3 | 25.0 | 0 | 0 |
| 21 | | T. Smith | 25.0 | 2008 |  BAL | 6 | 3 | 4 | 75.0 | 82 | 20.5 | 13.7 | 1 | 0 | 156.3 | 0.0 | 1 | 1 |
| 22 | | M. Stevens | 25.0 | 1987 | SF | 2 | 2 | 4 | 50.0 | 52 | 13.0 | 26.0 | 1 | 0 | 135.4 | 0.0 | 0 | 0 |
| 23 |  | T. Bradshaw | 25.0 | 1983 | PIT | 1 | 5 | 8 | 62.5 | 77 | 9.6 | 77.0 | 2 | 0 | 133.9 | 0.0 | 0 | 0 |
| 24 | | G. Nielsen | 25.0 | 1980 |  HOU | 16 | 2 | 4 | 50.0 | 12 | 3.0 | 0.8 | 1 | 0 | 95.8 | 0.0 | 0 | 0 |
| 25 | | C. Brown | 25.0 | 1975 | GB | 13 | 3 | 4 | 75.0 | 63 | 15.8 | 4.8 | 1 | 0 | 156.3 | 0.0 | 0 | 0 |
StatMuse has season-level data for passing touchdown percentage going back to the 1932 season.
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