The 2017 Cal Poly Mustangs football team represented California Polytechnic State University, San Luis Obispo as member of the Big Sky Conference during the 2017 NCAA Division I FCS football season. Led by ninth-year head coach Tim Walsh, Cal Poly compiled an overall record of 1–10 with a mark of 1–7 in conference play, placing 12th in the Big Sky. The Mustangs played home games at Mustang Stadium in San Luis Obispo, California. 
  Schedule
 | Date | Time | Opponent | Rank | Site | TV | Result | Attendance | Source | 
|---|
| August 26 | 4:00 p.m. | Colgate* | No. 23 |  | ESPNU | L 14–20 | 8,428 | [1][2] | 
 | September 2 | 4:30 p.m. | at San Jose State* | No. 23 |  |  | L 13–34 | 10,667 |  | 
 | September 9 | 2:00 p.m. | at No. 21 Northern Iowa* |  |  | ESPN3 | L 38–45 OT | 10,246 |  | 
 | September 23 | 6:05 p.m. | Northern Arizona |  | Alex G. Spanos StadiumSan Luis Obispo, CA
 | ELVN | L 10–28 | 7,726 |  | 
 | September 30 | 1:30 p.m. | at Idaho State |  |  | Pluto TV | L 34–38 | 7,105 |  | 
 | October 7 | 5:00 p.m. | at Southern Utah |  |  | Pluto TV | L 14–20 | 10,633 |  | 
 | October 21 | 6:05 p.m. | No. 23 Weber State |  | Alex G. Spanos StadiumSan Luis Obispo, CA
 | Pluto TV | L 3–17 | 9,324 |  | 
 | October 28 | 4:00 p.m. | at UC Davis |  |  | Pluto TV | L 28–31 | 10,503 |  | 
 | November 4 | 6:05 p.m. | Portland State  |  | Alex G. Spanos StadiumSan Luis Obispo, CA
 | Pluto TV | W 35–28 | 5,393 |  | 
 | November 11 | 6:05 p.m. | Sacramento State |  | Alex G. Spanos StadiumSan Luis Obispo, CA
 | Pluto TV | L 14–49 | 6,729 |  | 
 | November 18 | 10:30 a.m. | at Northern Colorado |  |  |  | L 0–42 | 3,650 |  | 
 | *Non-conference game HomecomingRankings from STATS Poll released prior to the gameAll times are in Pacific time
 | 
 [3][4][5] 
 Rankings
 Ranking movements
Legend: ██ Increase in ranking ██ Decrease in ranking
 — = Not ranked RV = Received votes|  | Week | 
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| Poll | Pre | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Final | 
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| STATS FCS | 23 | RV | RV | RV | — | — | — | — | — | — | — | — | — | — | 
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| Coaches | 23 | RV | — | — | — | — | — | — | — | — | — | — | — | — | 
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 Game summaries
 Colgate
    |  |  |  |  |  | Total | 
  | Raiders | 10 | 7 | 3 | 0 | 20 | 
  | No. 23 Mustangs | 0 | 0 | 0 | 14 | 14 | 
   At San Jose State
    |  |  |  |  |  | Total | 
  | No. 23 Mustangs | 3 | 3 | 0 | 7 | 13 | 
  | Spartans | 0 | 7 | 13 | 14 | 34 | 
   At Northern Iowa
    |  |  |  |  |  |  | Total | 
  | Mustangs | 7 | 14 | 3 | 14 | 0 | 38 | 
  | No. 21 Panthers | 0 | 28 | 7 | 3 | 7 | 45 | 
   Northern Arizona
    |  |  |  |  |  | Total | 
  | Lumberjacks | 7 | 7 | 14 | 0 | 28 | 
  | Mustangs | 3 | 0 | 7 | 0 | 10 | 
   At Idaho State
    |  |  |  |  |  | Total | 
  | Mustangs | 0 | 17 | 14 | 3 | 34 | 
  | Bengals | 10 | 7 | 7 | 14 | 38 | 
   At Southern Utah
    |  |  |  |  |  | Total | 
  | Mustangs | 7 | 0 | 0 | 7 | 14 | 
  | Thunderbirds | 10 | 7 | 0 | 3 | 20 | 
   Weber State
    |  |  |  |  |  | Total | 
  | No. 23 Wildcats | 8 | 0 | 3 | 6 | 17 | 
  | Mustangs | 0 | 3 | 0 | 0 | 3 | 
   At UC Davis
    |  |  |  |  |  | Total | 
  | Mustangs | 7 | 7 | 7 | 7 | 28 | 
  | Aggies | 21 | 10 | 0 | 0 | 31 | 
   Portland State
    |  |  |  |  |  | Total | 
  | Vikings | 14 | 7 | 7 | 0 | 28 | 
  | Mustangs | 7 | 14 | 7 | 7 | 35 | 
   Sacramento State
    |  |  |  |  |  | Total | 
  | Hornets | 14 | 14 | 21 | 0 | 49 | 
  | Mustangs | 0 | 0 | 0 | 14 | 14 | 
   At Northern Colorado
    |  |  |  |  |  | Total | 
  | Mustangs | 0 | 0 | 0 | 0 | 0 | 
  | Bears | 0 | 21 | 21 | 0 | 42 | 
   References
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| Venues |  | 
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| Bowls & rivalries |  | 
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| Culture & lore |  | 
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| People |  | 
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| Seasons |  | 
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| National championship seasons in bold |