| Year | W | L | Sv | Hold | IP | H | BB | SO | ER | ERA | WHIP | Rate |
| 2026 proj | 11 | 8 | 0 | 0 | 146.0 | 132 | 31 | 114 | 61 | 3.76 | 1.121 | 38.8 |
| 2026 | 2 | 4 | 0 | 0 | 61.3 | 59 | 22 | 53 | 37 | 5.43 | 1.321 | -9.9 |
| 2025 | 11 | 7 | 0 | 0 | 129.7 | 110 | 27 | 98 | 53 | 3.68 | 1.057 | 46.4 |
| 2024 | 12 | 8 | 0 | 0 | 165.3 | 154 | 33 | 125 | 60 | 3.27 | 1.131 | 65.7 |
| Date | News |
| 6/10/26 | Cubs' Taillon out until after the All-Star break. The Chicago Cubs are expected to be without starter Jameson Taillon until after the All-Star break due to a strained left hamstring. Source: https://www.espn.com/mlb/story/_/id/49014382/cubs-... |
| 6/10/26 | Cubs' Taillon out until after the All-Star break. The Chicago Cubs are expected to be without starter Jameson Taillon until after the All-Star break due to a strained left hamstring. Source: https://www.espn.com/mlb/story/_/id/49014382/cubs-... |
| 6/10/26 | Cubs' Taillon out until after the All-Star break. The Chicago Cubs are expected to be without starter Jameson Taillon until after the All-Star break due to a strained left hamstring. Source: https://www.espn.com/mlb/story/_/id/49014382/cubs-... |
| 6/09/26 | Cubs' Taillon out until after the All-Star break. The Chicago Cubs are expected to be without starter Jameson Taillon until after the All-Star break due to a strained left hamstring. Source: https://www.espn.com/mlb/story/_/id/49014382/cubs-... |
| 6/08/26 | Cubs' Taillon exits in 2nd with hamstring strain. Cubs starter Jameson Taillon will be placed on the injured list after exiting Sunday's game against the Giants with a left hamstring strain in the top of the second inning. Source: https://www.espn.com/mlb/story/_/id/48996077/cubs-... |
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