First meeting: Oct. 1, 2010 - Union 10, Mountain View 0
Latest meeting: Sept. 20, 2024 - Union 21, Mountain View 0
Next meeting: 2025
Meetings total: 15
All-time series: Union Leads 12-3
League series: Tied 1-1
Post-season series: n/a
Largest victory: Union, 60-13 (2021)
Longest win streak: Union, 6 (2016-2021)
Current win streak: Union, 1 (2024-present)
| Mountain View Victories | Union Victories | Tie Games |
| No. | Date | Winning Team | Losing Team | |||
| 1 | Oct. 1, 2010 | Union | 10 | at Mountain View | 0 | |
| 2 | Sept. 30, 2011 | at Union | 33 | Mountain View | 21 | |
| 3 | Aug. 31, 2012 | at Union | 35 | Mountain View | 7 | |
| 4 | Sept. 6, 2013 | Union | 44 | at Mountain View | 0 | |
| 5 | Sept. 19, 2014 | at Union* | 52 | Mountain View | 21 | |
| 6 | Sept. 18, 2015 | at Mountain View* | 46 | Union | 28 | |
| 7 | Sept. 9, 2016 | Union | 43 | Mountain View | 18 | |
| 8 | Sept. 8, 2017 | Union | 21 | at Mountain View | 21 | |
| 9 | Aug. 31, 2018 | Union | 17 | at Mountain View | 14 | |
| 10 | Sept. 6, 2019 | at Union | 20 | Mountain View | 10 | |
| 11 | Mar. 5, 2021 | at Union | 60 | Mountain View | 13 | |
| 12 | Sept. 10, 2021 | at Union | 35 | Mountain View | 21 | |
| 13 | Sept. 16, 2022 | at Mountain View | 62 | Union | 35 | |
| 14 | Sept. 15, 2023 | Mountain View | 42 | at Union | 27 | |
| 15 | Sept. 20, 2024 | at Union | 21 | Mountain View | 0 | |