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Jack Flaherty
MLB
About Jack Flaherty
Jack Rafe Flaherty (, born October 15, 1995) is an American professional baseball pitcher for the Detroit Tigers of Major League Baseball (MLB). He has previously played in MLB for the St. Louis Cardinals, Baltimore Orioles, and Los Angeles Dodgers. Flaherty was selected by the Cardinals in the first round of the 2014 MLB draft and made his MLB debut with them in 2017.
Bio summary from Wikipedia.
Player Stats
| W | 3 | L | 8 | ERA | 4.48 | G | 20 |
|---|---|---|---|---|---|---|---|
| GS | 19 | SV | 0 | IP | 88.1 | H | 81 |
| R | 52 | ER | 44 | BB | 42 | SO | 103 |
| WHIP | 1.392 | H/9 | 8.3 | HR/9 | 1.1 | BB/9 | 4.3 |
| K/9 | 10.5 | FIP | 4.05 | WAR | -0.1 |
2026 pitching — Baseball-Reference
Career — Lahman, through 2025
Batting
| Year | Team | G | AB | R | H | 2B | 3B | HR | RBI | SB | BB | SO | AVG |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2017 | SLN | 6 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | .000 |
| 2018 | SLN | 31 | 46 | 2 | 7 | 0 | 0 | 0 | 0 | 0 | 2 | 20 | .152 |
| 2019 | SLN | 38 | 54 | 4 | 10 | 3 | 0 | 0 | 4 | 1 | 2 | 17 | .185 |
| 2021 | SLN | 17 | 17 | 2 | 2 | 0 | 0 | 1 | 3 | 0 | 5 | 7 | .118 |
Pitching
| Year | Team | W | L | ERA | G | GS | CG | SHO | SV | IP | H | HR | BB | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2017 | SLN | 0 | 2 | 6.33 | 6 | 5 | 0 | 0 | 0 | 21.1 | 23 | 4 | 10 | 20 |
| 2018 | SLN | 8 | 9 | 3.34 | 28 | 28 | 0 | 0 | 0 | 151.0 | 108 | 20 | 59 | 182 |
| 2019 | SLN | 11 | 8 | 2.75 | 33 | 33 | 0 | 0 | 0 | 196.1 | 135 | 25 | 55 | 231 |
| 2020 | SLN | 4 | 3 | 4.91 | 9 | 9 | 0 | 0 | 0 | 40.1 | 33 | 6 | 16 | 49 |
| 2021 | SLN | 9 | 2 | 3.22 | 17 | 15 | 0 | 0 | 0 | 78.1 | 57 | 12 | 26 | 85 |
| 2022 | SLN | 2 | 1 | 4.25 | 9 | 8 | 0 | 0 | 0 | 36.0 | 36 | 4 | 22 | 33 |
| 2023 | SLN | 7 | 6 | 4.43 | 20 | 20 | 0 | 0 | 0 | 109.2 | 116 | 10 | 54 | 106 |
| 2023 | BAL | 1 | 3 | 6.75 | 9 | 7 | 0 | 0 | 0 | 34.2 | 46 | 7 | 12 | 42 |
| 2024 | DET | 7 | 5 | 2.95 | 18 | 18 | 0 | 0 | 0 | 106.2 | 83 | 15 | 19 | 133 |
| 2024 | LAN | 6 | 2 | 3.58 | 10 | 10 | 0 | 0 | 0 | 55.1 | 52 | 9 | 19 | 61 |
| 2025 | DET | 8 | 15 | 4.64 | 31 | 31 | 0 | 0 | 0 | 161.0 | 147 | 23 | 59 | 188 |
Season lines from the Lahman Baseball Database (Version 2025, via SABR), joined through the Chadwick Register ID crosswalk. The databank runs through the 2025 season — the current season is the 2026 line below, from the MLB Stats API.
2026 Season — MLB Stats API
Pitching
| W | L | ERA | G | GS | CG | SHO | SV | IP | H | R | ER | HR | BB | SO | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 | 8 | 4.48 | 20 | 19 | 0 | 0 | 0 | 88.1 | 81 | 52 | 44 | 11 | 42 | 103 | 1.39 |
2026 regular-season line from the MLB Stats API (statsapi.mlb.com), pulled when this page was built. Multi-team stints are combined; rate stats are recomputed from the combined totals.
Watch Jack Flaherty Highlights
“Jack Flaherty 2021 MLB Highlights!” · Open on YouTube · More Jack Flaherty videos