Pitcher · 2026
Jack Flaherty
- Age
- 31
- B/T
- R/R
- Height
- 6' 4"
- Weight
- 225 lb
- Number
- #9
- Born
- October 15, 1995 in Burbank, CA, USA
- MLB debut
- September 1, 2017
- Drafted
- 2014, round 1
- High school
- Harvard-Westlake
- Salary, 2026
- $10M
- dbWAR
- 5.9 3 season(s)
- IP
- 86.1
- ERA
- 4.59
- FIP
- 4.08
- K/9
- 10.6
- FIP−
- 98 100 = avg
Jack Flaherty is a starting pitcher for the Detroit Tigers. In 2026 he struck out 102 batters over 86.1 innings across 19 appearances, 19 of them starts, going 3-8. His ERA of 4.59 was 9.8% higher than the league average of 4.18 — 14th of 17 on his team, and 315th of 467 among MLB pitchers with 20+ innings. Stripping out defence, his 4.08 FIP suggests he pitched better than his ERA shows. He missed bats on 27.1% of swings (12.2% of every pitch he threw), walked 10.8% of the batters he faced and struck out 26.2%. His 1.0 dbWAR is built from that FIP rather than runs allowed, so it credits him for what he controls and not for the defence behind him.
League context
Percentile among qualified pitchers, 2026.
Platoon splits
How left- and right-handed hitters fare against him.
| Split | PA | AB | H | HR | BB | SO | AVG | OBP | SLG | wOBA | K% |
|---|---|---|---|---|---|---|---|---|---|---|---|
| vs LHB | 214 | 179 | 41 | 5 | 29 | 50 | .229 | .340 | .391 | .330 | 23.4% |
| vs RHB | 175 | 155 | 39 | 6 | 13 | 52 | .252 | .326 | .445 | .335 | 29.7% |
Pitch sequencing
What Jack Flaherty throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Jack Flaherty throws in it.
Pitch arsenal
What he throws, how hard, and how often it misses in 2026.
| Four-Seam Fastball | 806 | 92.7 | 2,255 | 52.0% | 21.0% | |
| Slider | 397 | 85.0 | 2,439 | 44.3% | 32.0% | |
| Knuckle Curve | 321 | 78.1 | 2,401 | 43.9% | 37.6% | |
| Sinker | 73 | 90.9 | 2,061 | 27.4% | 24.0% | |
| Changeup | 42 | 85.4 | 1,815 | 21.4% | 27.3% |
Pitching
Standard and advanced, by season.
| Trend | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 19 | 19 | 86.1 | 3 | 8 | 0 | 80 | 44 | 102 | 42 | 4.59 | 4.08 | 1.41 | 10.6 | 4.4 | 110 | 98 | 1.0 | |
| 2025 | 31 | 31 | 161.0 | 8 | 15 | 0 | 147 | 83 | 188 | 59 | 4.64 | 3.85 | 1.28 | 10.5 | 3.3 | 112 | 93 | 2.2 | |
| 2024 | 28 | 28 | 162.0 | 13 | 7 | 0 | 135 | 57 | 194 | 38 | 3.17 | 3.48 | 1.07 | 10.8 | 2.1 | 78 | 85 | 2.8 |
Head to head
Put Jack Flaherty beside up to three others.
Similar players
Nearest 2026 seasons by command, run prevention and role, on rate statistics rather than totals.
wOBA uses linear weights measured from this season's own play-by-play rather than published constants, and wRC+ is park-adjusted against that same league. dbWAR is our own open implementation — not fWAR or bWAR — and the full derivation, including its simplifications, is on the methodology page.