| Team: | Portsmouth Spartans |
| Year: | 1931 |
| Record: | 11–3 |
| League Place: | 2nd NFL |
| Coach: | Potsy Clark |
| Stadium: | Universal Stadium |
| Shortnavlink: | Spartans seasons |
The 1931 Portsmouth Spartans season was their second in the league. The team improved on their previous season's output of 5–6–3, winning eleven games.[1] They finished second in the league.
| Game | Date | Opponent | Result | Record | Venue | Recap | |
|---|---|---|---|---|---|---|---|
| 1 | September 13 | Brooklyn Dodgers | W 14–0 | 1–0 | Universal Stadium | Recap | |
| 2 | Chicago Cardinals | W 13–3 | 2–0 | Universal Stadium | Recap | ||
| 3 | New York Giants | W 14–6 | 3–0 | Universal Stadium | Recap | ||
| 4 | Cleveland Indians | W 6–0 | 4–0 | Universal Stadium | Recap | ||
| 5 | Frankford Yellow Jackets | W 19–0 | 5–0 | Universal Stadium | Recap | ||
| 6 | October 18 | at Brooklyn Dodgers | W 19–0 | 6–0 | Ebbets Field | Recap | |
| 7 | October 25 | at Staten Island | W 20–7 | 7–0 | Thompson Stadium | Recap | |
| 8 | at Frankford Yellow Jackets | W 14–0 | 8–0 | Baker Bowl | Recap | ||
| 9 | November 1 | at New York Giants | L 0–14 | 8–1 | Polo Grounds | Recap | |
| 10 | November 8 | at Chicago Bears | L 6–9 | 8–2 | Wrigley Field | Recap | |
| 11 | Staten Island Stapletons | W 14–12 | 9–2 | Universal Stadium | Recap | ||
| 12 | November 15 | Cleveland Indians | W 14–6 | 10–2 | Redland Field | Recap | |
| 13 | November 22 | at Chicago Cardinals | L 19–20 | 10–3 | Wrigley Field | Recap | |
| 14 | November 29 | Chicago Bears | W 3–0 | 11–3 | Universal Stadium | Recap |