| Karl Grau record | |||||
|---|---|---|---|---|---|
| Year | School | Won | Lost | Title | Class |
| 2012-13 | Bluffton | 5 | 15 | 2A | |
| 2013-14 | Bluffton | 5 | 15 | 2A | |
| 2014-15 | Bluffton | 12 | 12 | 2A | |
| 2015-16 | Bluffton | 9 | 16 | 2A | |
| 2016-17 | Bluffton | 11 | 12 | 2A | |
| 2017-18 | Bluffton | 17 | 8 | sectional | 2A |
| 2018-19 | Bluffton | 13 | 12 | sectional | 2A |
| 2019-20 | Bluffton | 9 | 16 | 2A | |