| | | |
| June 1, 2018 | L | Walla Walla Sweets 3 at Yakima Valley Pippins 2 | Final |
| June 2, 2018 | W | Walla Walla Sweets 5 at Yakima Valley Pippins 8 | Final |
| June 3, 2018 | W | Walla Walla Sweets 1 at Yakima Valley Pippins 8 | Final |
| June 5, 2018 | L | Yakima Valley Pippins 3 at Victoria HabourCats 6 | Final |
| June 6, 2018 | L | Yakima Valley Pippins 5 at Victoria HabourCats 6 | Final |
| June 7, 2018 | W | Yakima Valley Pippins 5 at Victoria HabourCats 2 | Final |
| June 8, 2018 | W | Bend Elks 2 at Yakima Valley Pippins 10 | Final |
| June 9, 2018 | W | Bend Elks 2 at Yakima Valley Pippins 4 | Final |
| June 10, 2018 | W | Bend Elks 2 at Yakima Valley Pippins 9 | Final |
| June 12, 2018 | L | Yakima Valley Pippins 4 at Portland Pickles 7 | Final |
| June 13, 2018 | L | Yakima Valley Pippins 3 at Portland Pickles 8 | Final |
| June 14, 2018 | L | Yakima Valley Pippins 4 at Portland Pickles 6 | Final |
| June 19, 2018 | L | Kelowna Falcons 9 at Yakima Valley Pippins 2 | Final |
| June 20, 2018 | W | Kelowna Falcons 6 at Yakima Valley Pippins 14 | Final |
| June 21, 2018 | W | Kelowna Falcons 5 at Yakima Valley Pippins 13 | Final |
| June 22, 2018 | L | Yakima Valley Pippins 1 at Kelowna Falcons 7 | Final |
| June 23, 2018 | L | Yakima Valley Pippins 0 at Kelowna Falcons 9 | Final |
| June 24, 2018 | L | Yakima Valley Pippins 7 at Kelowna Falcons 8 | Final |
| June 26, 2018 | W | Cowlitz Black Bears 3 at Yakima Valley Pippins 11 | Final |
| June 27, 2018 | L | Cowlitz Black Bears 2 at Yakima Valley Pippins 0 | Final |
| June 28, 2018 | W | Cowlitz Black Bears 3 at Yakima Valley Pippins 6 | Final |
| June 29, 2018 | L | Bellingham Bells 4 at Yakima Valley Pippins 0 | Final |
| June 30, 2018 | L | Bellingham Bells 3 at Yakima Valley Pippins 2 | Final |
| July 1, 2018 | L | Bellingham Bells 8 at Yakima Valley Pippins 1 | Final |
| July 2, 2018 | L | Yakima Valley Pippins 0 at Wenatchee AppleSox 4 | Final |
| July 3, 2018 | W | Yakima Valley Pippins 10 at Wenatchee AppleSox 9 | Final (11) |
| July 4, 2018 | L | Yakima Valley Pippins 2 at Wenatchee AppleSox 5 | Final |
| July 6, 2018 | L | Yakima Valley Pippins 1 at Port Angeles Lefties 3 | Final |
| July 7, 2018 | W | Yakima Valley Pippins 10 at Port Angeles Lefties 3 | Final |
| July 8, 2018 | W | Yakima Valley Pippins 11 at Port Angeles Lefties 9 | Final |
| July 10, 2018 | L | Corvallis Knights 5 at Yakima Valley Pippins 4 | Final (11) |
| July 11, 2018 | W | Corvallis Knights 6 at Yakima Valley Pippins 13 | Final |
| July 12, 2018 | W | Corvallis Knights 6 at Yakima Valley Pippins 7 | Final |
| July 13, 2018 | W | Yakima Valley Pippins 15 at Bend Elks 1 | Final |
| July 14, 2018 | W | Yakima Valley Pippins 8 at Bend Elks 6 | Final |
| July 15, 2018 | W | Yakima Valley Pippins 12 at Bend Elks 3 | Final (8) |
| July 18, 2018 | W | Port Angeles Lefties 3 at Yakima Valley Pippins 4 | Final |
| July 19, 2018 | W | Port Angeles Lefties 2 at Yakima Valley Pippins 9 | Final |
| July 20, 2018 | W | Port Angeles Lefties 3 at Yakima Valley Pippins 5 | Final |
| July 21, 2018 | W | Wenatchee AppleSox 4 at Yakima Valley Pippins 5 | Final |
| July 22, 2018 | L | Wenatchee AppleSox 8 at Yakima Valley Pippins 1 | Final |
| July 23, 2018 | L | Wenatchee AppleSox 8 at Yakima Valley Pippins 3 | Final |
| July 27, 2018 | W | Yakima Valley Pippins 7 at Cowlitz Black Bears 5 | Final |
| July 28, 2018 | L | Yakima Valley Pippins 2 at Cowlitz Black Bears 3 | Final |
| July 29, 2018 | W | Yakima Valley Pippins 7 at Cowlitz Black Bears 5 | Final (11) |
| July 31, 2018 | W | Victoria HabourCats 9 at Yakima Valley Pippins 10 | Final |
| August 1, 2018 | L | Victoria HabourCats 8 at Yakima Valley Pippins 4 | Final |
| August 2, 2018 | L | Victoria HabourCats 6 at Yakima Valley Pippins 5 | Final |
| August 3, 2018 | L | Yakima Valley Pippins 3 at Walla Walla Sweets 4 | Final |
| August 4, 2018 | L | Yakima Valley Pippins 3 at Walla Walla Sweets 7 | Final |
| August 5, 2018 | W | Yakima Valley Pippins 9 at Walla Walla Sweets 3 | Final |
| August 6, 2018 | L | Yakima Valley Pippins 5 at Corvallis Knights 9 | Final |
| August 7, 2018 | L | Yakima Valley Pippins 0 at Corvallis Knights 2 | Final |
| August 8, 2018 | W | Yakima Valley Pippins 5 at Corvallis Knights 3 | Final |
Yakima Valley Pippins Schedule
