| Dave Duncan record | |||||
|---|---|---|---|---|---|
| Year | School | Won | Lost | Title | Class |
| 2012-13 | Plymouth | 18 | 7 | sectional | 3A |
| 2013-14 | Plymouth | 14 | 7 | 4A | |
| 2014-15 | Plymouth | 16 | 7 | 4A | |
| 2015-16 | Plymouth | 9 | 14 | 4A | |
| 2016-17 | Plymouth | 13 | 10 | 4A | |
| 2017-18 | Plymouth | 11 | 12 | 4A | |
| 2018-19 | Plymouth | 20 | 6 | sectional | 4A |
| 2019-20 | Plymouth | 12 | 11 | 4A | |
| 2020-21 | Plymouth | 11 | 10 | 4A | |