NFL defensive rankings by year 1991
| TEAM | SEASON | GP | W | L | T | TD | PTS | PPG | OPP PTS | OPP PPG | 1DWN | 3DWN% | 4DWN% | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | Bears | 1991 | 16 | 11 | 5 | 0 | 35 | 299 | 18.7 | 269 | 16.8 | 317 | 43.0 | 38.9 |
| 2 |  | Cardinals | 1991 | 16 | 4 | 12 | 0 | 19 | 196 | 12.3 | 344 | 21.5 | 237 | 33.3 | 23.5 |
| 3 |  | Packers | 1991 | 16 | 4 | 12 | 0 | 31 | 273 | 17.1 | 313 | 19.6 | 259 | 37.2 | 57.1 |
| 4 |  | Giants | 1991 | 16 | 8 | 8 | 0 | 30 | 281 | 17.6 | 297 | 18.6 | 280 | 42.6 | 43.8 |
| 5 |  | Lions | 1991 | 16 | 12 | 4 | 0 | 40 | 339 | 21.2 | 295 | 18.4 | 280 | 36.5 | 50.0 |
| 6 |  | Redskins | 1991 | 16 | 14 | 2 | 0 | 56 | 485 | 30.3 | 224 | 14.0 | 302 | 50.5 | 57.1 |
| 7 |  | Eagles | 1991 | 16 | 10 | 6 | 0 | 29 | 285 | 17.8 | 244 | 15.3 | 249 | 32.7 | 61.5 |
| 8 |  | Steelers | 1991 | 16 | 7 | 9 | 0 | 32 | 292 | 18.3 | 344 | 21.5 | 254 | 31.5 | 35.3 |
| 9 |  | Rams | 1991 | 16 | 3 | 13 | 0 | 26 | 234 | 14.6 | 390 | 24.4 | 270 | 37.9 | 47.4 |
| 10 |  | Browns | 1991 | 16 | 6 | 10 | 0 | 35 | 293 | 18.3 | 298 | 18.6 | 265 | 37.2 | 45.0 |
| 11 |  | 49ers | 1991 | 16 | 10 | 6 | 0 | 50 | 393 | 24.6 | 239 | 14.9 | 336 | 47.7 | 37.5 |
| 12 |  | Colts | 1991 | 16 | 1 | 15 | 0 | 14 | 143 | 8.9 | 381 | 23.8 | 236 | 31.3 | 40.0 |
| 13 |  | Bills | 1991 | 16 | 13 | 3 | 0 | 58 | 458 | 28.6 | 318 | 19.9 | 359 | 47.1 | 33.3 |
| 14 |  | Broncos | 1991 | 16 | 12 | 4 | 0 | 32 | 304 | 19.0 | 235 | 14.7 | 284 | 41.5 | 57.1 |
| 15 |  | Chiefs | 1991 | 16 | 10 | 6 | 0 | 35 | 322 | 20.1 | 252 | 15.8 | 322 | 44.9 | 60.0 |
| 16 |  | Patriots | 1991 | 16 | 6 | 10 | 0 | 22 | 211 | 13.2 | 305 | 19.1 | 259 | 33.8 | 46.2 |
| 17 |  | Jets | 1991 | 16 | 8 | 8 | 0 | 32 | 314 | 19.6 | 293 | 18.3 | 331 | 37.9 | 57.1 |
| 18 |  | Oilers | 1991 | 16 | 11 | 5 | 0 | 46 | 386 | 24.1 | 251 | 15.7 | 353 | 49.7 | 33.3 |
| 19 |  | Raiders | 1991 | 16 | 9 | 7 | 0 | 30 | 298 | 18.6 | 297 | 18.6 | 248 | 38.5 | 58.3 |
| 20 |  | Chargers | 1991 | 16 | 4 | 12 | 0 | 31 | 274 | 17.1 | 342 | 21.4 | 285 | 35.0 | 52.0 |
| 21 |  | Cowboys | 1991 | 16 | 11 | 5 | 0 | 37 | 342 | 21.4 | 310 | 19.4 | 304 | 37.8 | 42.9 |
| 22 |  | Vikings | 1991 | 16 | 8 | 8 | 0 | 36 | 301 | 18.8 | 306 | 19.1 | 300 | 39.6 | 40.0 |
| 23 |  | Dolphins | 1991 | 16 | 8 | 8 | 0 | 35 | 343 | 21.4 | 349 | 21.8 | 312 | 41.0 | 76.9 |
| 24 |  | Falcons | 1991 | 16 | 10 | 6 | 0 | 42 | 361 | 22.6 | 338 | 21.1 | 258 | 35.6 | 55.6 |
| 25 |  | Saints | 1991 | 16 | 11 | 5 | 0 | 38 | 341 | 21.3 | 211 | 13.2 | 267 | 37.7 | 50.0 |
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