The 2021 season will be the 15th for the team. To commemorate the occasion, here is a list of the best 15 pitching seasons, as measured by VORP (value over replacement player), from 2007-20.
| Rank | Pitcher | Year | VORP | G | GS | CG | W | L | SV | ERA | IP | R | ER | H | BB | SO |
| 1. | Anthony Bush | 2012 | 24.87 | 12 | 12 | 4 | 5 | 3 | 0 | 2.36 | 68.2 | 31 | 18 | 86 | 13 | 50 |
| 2. | Jake Lewis | 2016 | 24.83 | 12 | 10 | 5 | 5 | 5 | 0 | 2.99 | 72.1 | 34 | 24 | 70 | 29 | 86 |
| 3. | Jake Lewis | 2015 | 22.89 | 11 | 8 | 2 | 2 | 2 | 1 | 2.77 | 65.0 | 30 | 20 | 66 | 14 | 85 |
| 4. | Jesse Olson | 2012 | 19.27 | 15 | 8 | 6 | 5 | 4 | 1 | 2.51 | 71.2 | 39 | 20 | 72 | 30 | 52 |
| 5. | Jake Lewis | 2019 | 18.18 | 4 | 4 | 2 | 3 | 0 | 0 | 1.56 | 34.2 | 10 | 6 | 20 | 11 | 47 |
| 6. | Jake Lewis | 2020 | 15.79 | 4 | 4 | 0 | 2 | 1 | 0 | 0.37 | 24.1 | 4 | 1 | 13 | 8 | 40 |
| 7. | Anthony Bush | 2010 | 14.82 | 13 | 13 | 4 | 3 | 8 | 0 | 3.36 | 88.1 | 57 | 33 | 108 | 17 | 58 |
| 8. | Nick Koubsky | 2007 | 14.24 | 6 | 3 | 3 | 3 | 0 | 0 | 1.32 | 27.1 | 8 | 4 | 22 | 10 | 15 |
| 9. | Anthony Bush | 2016 | 13.94 | 15 | 3 | 1 | 1 | 1 | 2 | 1.47 | 30.2 | 11 | 5 | 34 | 4 | 22 |
| 10. | Peter Lenz | 2018 | 13.56 | 8 | 5 | 0 | 2 | 4 | 1 | 3.22 | 36.1 | 16 | 13 | 34 | 16 | 26 |
| 11. | Jake Lewis | 2013 | 13.53 | 6 | 1 | 1 | 2 | 0 | 1 | 0.44 | 20.1 | 3 | 1 | 12 | 6 | 24 |
| 12. | Chris Vendela | 2011 | 13.25 | 9 | 7 | 5 | 4 | 3 | 1 | 3.34 | 59.1 | 35 | 22 | 53 | 25 | 86 |
| 13. | Anthony Bush | 2015 | 12.02 | 10 | 3 | 0 | 5 | 0 | 1 | 1.69 | 32.0 | 14 | 6 | 24 | 9 | 22 |
| 14. | Anthony Bush | 2008 | 11.80 | 11 | 11 | 1 | 3 | 4 | 0 | 2.90 | 59.0 | 30 | 19 | 57 | 21 | 37 |
| 15. | Kyle Hall | 2008 | 10.85 | 6 | 6 | 1 | 2 | 1 | 0 | 1.64 | 33.0 | 16 | 6 | 24 | 15 | 30 |