| Year | W | L | Sv | Hold | IP | H | BB | SO | ER | ERA | WHIP | Rate |
| 2026 proj | 4 | 4 | 0 | 1 | 77.0 | 70 | 30 | 79 | 36 | 4.21 | 1.299 | 12.8 |
| 2026 | 0 | 0 | 0 | 0 | 5.0 | 4 | 1 | 8 | 1 | 1.80 | 1.000 | 44.1 |
| 2025 | 1 | 1 | 0 | 1 | 35.7 | 35 | 14 | 38 | 16 | 4.04 | 1.374 | 6.7 |
| 2024 | 7 | 7 | 0 | 0 | 124.3 | 125 | 42 | 118 | 63 | 4.56 | 1.343 | 15.6 |
| Date | News |
| 3/19/26 | Brewers LHP Harrison exits start with blister. Kyle Harrison, who has been competing for a spot in Milwaukee's starting rotation, left Wednesday because of a blister on his left index finger. Source: https://www.espn.com/mlb/story/_/id/48243482/brewe... |
| 3/18/26 | Brewers LHP Harrison exits start with blister. Kyle Harrison, who has been competing for a spot in Milwaukee's starting rotation, left Wednesday because of a blister on his left index finger. Source: https://www.espn.com/mlb/story/_/id/48243482/brewe... |
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