San Francisco 49ers Single Season Passing Leaders

Ranked by Passing Interception Percentage

The following are the San Francisco 49ers single season passing leaders ranked by passing interception percentage. Included are player stats for the San Francisco 49ers (NFL) from 1950-2020 and the San Francisco 49ers (AAFC) from 1946-1949. Only stats for Regular Season Games have been included. Alex Smith is the San Francisco 49ers single season leader in with 1.124.

Players active with the San Francisco 49ers during the 2019 NFL season are listed in bold.

Leaders based on 224 pass attempts

      Passing
Player Season Team Att Cmp Pct Yds Int Int% TD Rating
  A. Smith 2011 SF 445 273 61.3 3,144 5 1.12 17 90.7
  C. Kaepernick 2016 SF 331 196 59.2 2,241 4 1.21 16 90.7
  S. Young 1997 SF 356 241 67.7 3,029 6 1.69 19 104.7
  S. Bono 1991 SF 237 141 59.5 1,617 4 1.69 11 88.5
  S. Young 1992 SF 402 268 66.7 3,465 7 1.74 25 107.0
  J. Garcia 2000 SF 561 355 63.3 4,278 10 1.78 31 97.6
  J. Garcia 2002 SF 528 328 62.1 3,344 10 1.89 21 85.6
  S. Young 1996 SF 316 214 67.7 2,410 6 1.90 14 97.2
  C. Kaepernick 2013 SF 416 243 58.4 3,197 8 1.92 21 91.6
  C. Kaepernick 2015 SF 244 144 59.0 1,615 5 2.05 6 78.5
  J. Montana 1989 SF 386 271 70.2 3,521 8 2.07 26 112.4
  C. Kaepernick 2014 SF 478 289 60.5 3,369 10 2.09 19 86.4
  S. Young 1994 SF 461 324 70.3 3,969 10 2.17 35 112.8
  J. Montana 1984 SF 432 279 64.6 3,630 10 2.31 28 102.9
  S. Young 1998 SF 517 322 62.3 4,170 12 2.32 36 101.1
  J. Montana 1983 SF 515 332 64.5 3,910 12 2.33 26 94.6
  J. Garcia 2001 SF 504 316 62.7 3,538 12 2.38 32 94.8
  J. Montana 1981 SF 488 311 63.7 3,565 12 2.46 19 88.4
  S. Young 1995 SF 447 299 66.9 3,200 11 2.46 20 92.3
  B. Gabbert 2015 SF 282 178 63.1 2,031 7 2.48 10 86.2
  J. Montana 1988 SF 397 238 59.9 2,981 10 2.52 18 87.9
  J. Montana 1985 SF 494 303 61.3 3,653 13 2.63 27 91.3
  J. Brodie 1970 SF 378 223 59.0 2,941 10 2.65 24 93.8
  C. Beathard 2017 SF 224 123 54.9 1,430 6 2.68 4 69.2
  J. Garoppolo 2019 SF 476 329 69.1 3,978 13 2.73 27 102.0
  S. Hill 2008 SF 288 181 62.8 2,046 8 2.78 13 87.5
  S. Young 1991 SF 279 180 64.5 2,517 8 2.87 17 101.8
  A. Smith 2010 SF 342 204 59.6 2,370 10 2.92 14 82.1
  J. Montana 1986 SF 307 191 62.2 2,236 9 2.93 8 80.7
  J. Garcia 1999 SF 375 225 60.0 2,544 11 2.93 11 77.9
  Y. Tittle 1954 SF 295 170 57.6 2,205 9 3.05 9 78.7
  J. Montana 1990 SF 520 321 61.7 3,944 16 3.08 26 89.0
  T. Rattay 2004 SF 325 198 60.9 2,169 10 3.08 10 78.1
  J. Montana 1982 SF 346 213 61.6 2,613 11 3.18 17 88.0
  A. Smith 2009 SF 372 225 60.5 2,350 12 3.23 18 81.5
  J. Montana 1987 SF 398 266 66.8 3,054 13 3.27 31 102.1
  J. Montana 1980 SF 273 176 64.5 1,795 9 3.30 15 87.8
  J. Garcia 2003 SF 392 225 57.4 2,704 13 3.32 18 80.1
  S. Young 1993 SF 462 314 68.0 4,023 16 3.46 29 101.5
  A. Smith 2006 SF 442 257 58.1 2,890 16 3.62 16 74.8
  S. DeBerg 1979 SF 578 347 60.0 3,652 21 3.63 17 73.1
  N. Mullens 2018 SF 274 176 64.2 2,277 10 3.65 13 90.8
  K. Dorsey 2004 SF 226 123 54.4 1,231 9 3.98 6 62.4
  J. Brodie 1964 SF 392 193 49.2 2,498 16 4.08 14 64.6
  J. Brodie 1965 SF 391 242 61.9 3,112 16 4.09 30 95.3
  J. Brodie 1961 SF 283 155 54.8 2,588 12 4.24 14 84.7
  J. Brodie 1969 SF 347 194 55.9 2,405 15 4.32 16 74.9
  J. Brodie 1967 SF 349 168 48.1 2,013 16 4.58 11 57.6
  J. Brodie 1966 SF 427 232 54.3 2,810 22 5.15 16 65.8
  J. Brodie 1968 SF 404 234 57.9 3,020 21 5.20 22 78.0