(Mitchell vs Harrisburg) C
| 1 | 2 | T | |
| MIT | 0 | 0 | 0 |
| HAR | 2 | 3 | 5 |
(Harrisburg vs Brandon Valley) C
| 1 | 2 | T | |
| HAR | 1 | 2 | 3 |
| BRV | 0 | 0 | 0 |
(Aberdeen Central vs Harrisburg) C
| 1 | 2 | T | |
| ABC | 0 | 0 | 0 |
| HAR | 3 | 2 | 5 |
(Tea Area vs Harrisburg) C
| 1 | 2 | T | |
| 0 | 0 | 0 | |
| HAR | 2 | 2 | 4 |
(Harrisburg vs Sioux Falls Washington) C
| 1 | 2 | T | |
| HAR | 2 | 2 | 4 |
| SFW | 0 | 0 | 0 |
(Watertown vs Harrisburg) C
(Watertown vs Harrisburg) C
| 1 | 2 | T | |
| WAT | 0 | 0 | 0 |
| HAR | 1 | 3 | 4 |
(Harrisburg vs Pierre T.F. Riggs)
| 1 | 2 | T | |
| HAR | 2 | 0 | 2 |
| PIE | 0 | 0 | 0 |
Postponed to 9/29/25 C
(Harrisburg vs Sioux Falls Roosevelt) C
| 1 | 2 | T | |
| HAR | 1 | 0 | 1 |
| SFR | 0 | 0 | 0 |
(Yankton vs Harrisburg) C
| 1 | 2 | T | |
| YAN | 0 | 0 | 0 |
| HAR | 2 | 3 | 5 |
(Harrisburg vs Brookings) C
| 1 | 2 | T | |
| HAR | 3 | 0 | 3 |
| BRO | 0 | 0 | 0 |
(Sioux Falls Lincoln vs Harrisburg) C
| 1 | 2 | T | |
| SFL | 0 | 0 | 0 |
| HAR | 0 | 0 | 0 |
Postponed from 9/16/25 C
| 1 | 2 | T | |
| HAR | 0 | 1 | 1 |
| OGO | 2 | 1 | 3 |
(Sioux Falls Jefferson vs Harrisburg) C
| 1 | 2 | T | |
| SFJ | 0 | 0 | 0 |
| HAR | 3 | 2 | 5 |
(Huron vs Harrisburg) C
| 1 | 2 | T | |
| HUR | 0 | 0 | 0 |
| HAR | 9 | 0 | 13 |
Class AA - State First Round
| 1 | 2 | T | |
| SFW | 0 | 0 | 0 |
| HAR | 4 | 0 | 4 |
Class AA - State Quarterfinal
| 1 | 2 | T | |
| YAN | 0 | 0 | 0 |
| HAR | 0 | 1 | 1 |
Class AA - State Semifinal
| 1 | 2 | T | |
| PIE | 0 | 0 | 0 |
| HAR | 1 | 0 | 1 |
Class AA - State Championship
| 1 | 2 | T | |
| OGO | 0 | 1 | 1 |
| HAR | 1 | 2 | 3 |
| Team | CONF | ST | OVER | PCT |
|---|---|---|---|---|
| Pierre T.F. Riggs | 2-0-0 | L1 | 13-3-1 | .794 |
| Harrisburg | 11-1-1 | W6 | 16-1-1 | .917 |
| Watertown | 2-1-0 | L1 | 8-7-1 | .531 |
| Yankton | 1-1-0 | L1 | 9-4-3 | .656 |
| Aberdeen Central | 1-1-0 | L1 | 9-5-2 | .625 |
| Brookings | 1-2-0 | L1 | 4-7-4 | .400 |
| Mitchell | 1-2-0 | L1 | 5-10-0 | .333 |
| Tea Area | 2-6-1 | L2 | 2-10-2 | .214 |
| Huron | 0-2-0 | L14 | 0-14-0 | .000 |