| Team: | Ottawa Rough Riders |
| Year: | 1908 |
| Record: | 5–1 |
| League Place: | 1st, IRFU |
| Coach: | Tom Clancy |
| Playoffs: | Lost League Playoff |
| Shortnavlink: | Other seasons |
The 1908 Ottawa Rough Riders finished in first place in the Interprovincial Rugby Football Union with a 5–1 record and qualified for the IRFU playoffs for the first time since its inception in the previous year. The Rough Riders were defeated by the Hamilton Tigers in a league playoff.
| Ottawa Rough Riders | 6 | 5 | 1 | 0 | 114 | 41 | 10 | |
| Hamilton Tigers | 6 | 5 | 1 | 0 | 131 | 42 | 10 | |
| 6 | 1 | 5 | 0 | 49 | 101 | 2 | ||
| 6 | 1 | 5 | 0 | 50 | 160 | 2 |
| Week | Date | Opponent | Result | Record | |
| 1 | Oct 3 | vs. Montreal Football Club | W 11–2 | 1–0 | |
|---|---|---|---|---|---|
| 2 | Oct 10 | at Toronto Argonauts | W 45–11 | 2–0 | |
| 3 | Oct 17 | at Hamilton Tigers | L 7–15 | 2–1 | |
| 4 | Oct 24 | vs. Toronto Argonauts | W 21–2 | 3–1 | |
| 5 | Oct 31 | at Montreal Football Club | W 22–5 | 4–1 | |
| 6 | Nov 7 | vs. Hamilton Tigers | W 8–6 | 5–1 |
| Round | Date | Opponent | Result | |
| IRFU Playoff | Nov 20 | at Hamilton Tigers | L 9–11 |
|---|