| 1 | Monterchiese E. - San Marco | 08-10-2017 15:30 | 1 - 1 |
| 2 | San Marco - C. Pestello | 15-10-2017 15:30 | 4 - 1 |
| 3 | Sangiustinese - San Marco | 22-10-2017 15:30 | 2 - 0 |
| 4 | San Marco - A. Valdambra | 29-10-2017 14:30 | 0 - 1 |
| 5 | Fortis Arezzo - San Marco | 05-11-2017 14:30 | 0 - 1 |
| 6 | San Marco - Pietraia | 12-11-2017 14:30 | 2 - 1 |
| 7 | Virtus Lignano - San Marco | 19-11-2017 14:30 | 3 - 6 |
| 8 | San Marco - Indomita Quarata | 26-11-2017 14:30 | 1 - 1 |
| 9 | Monsigliolo - San Marco | 10-12-2017 14:30 | 2 - 1 |
| 10 | San Marco - Badia a Roti | 17-12-2017 14:30 | 3 - 2 |
| 11 | San Marco - Monterchiese E. | 21-01-2018 14:30 | 2 - 0 |
| 12 | C. Pestello - San Marco | 28-01-2018 15:00 | 1 - 1 |
| 13 | San Marco - Sangiustinese | 04-02-2018 15:00 | 3 - 0 |
| 14 | A. Valdambra - San Marco | 11-02-2018 15:00 | 1 - 2 |
| 15 | San Marco - Fortis Arezzo | 18-02-2018 15:00 | 0 - 1 |
| 16 | Pietraia - San Marco | 25-02-2018 15:00 | 2 - 0 |
| 17 | San Marco - Virtus Lignano | 04-03-2018 15:00 | 6 - 1 |
| 18 | Indomita Quarata - San Marco | 11-03-2018 15:00 | 1 - 1 |
| 19 | San Marco - Monsigliolo | 25-03-2018 15:30 | 3 - 0 |
| 20 | Badia a Roti - San Marco | 08-04-2018 15:30 | 0 - 0 |