Players · G · Pitcher · 2026
Zac Gallen
- Age
- 31
- B/T
- R/R
- Height
- 6' 2"
- Weight
- 189 lb
- Number
- #23
- Born
- August 3, 1995 in Somerdale, NJ, United States
- MLB debut
- June 20, 2019
- Drafted
- 2016, round 3
- College
- North Carolina
- Salary, 2026
- $16.2M
- dbWAR
- 18.8 10 season(s)
- IP
- 105.1
- ERA
- 6.07
- FIP
- 5.34
- K/9
- 5.5
- FIP−
- 128 100 = avg
Zac Gallen is a starting pitcher for the Arizona Diamondbacks. In 2026 he struck out 64 batters over 105.1 innings across 22 appearances, 20 of them starts, going 3-9. His ERA of 6.07 is 45.2% higher than the league average of 4.18 — the second worst on his team, and 488th of 538 among MLB pitchers with 20+ innings. Stripping out defence, his 5.34 FIP suggests he pitched better than his ERA shows. He missed bats on 19.0% of swings (8.8% of every pitch he threw), walked 7.4% of the batters he faced and struck out 13.6%. His -0.2 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.
WAR by season
Pitching
Standard and advanced, by season.
| Trend | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | AZ | 22 | 20 | 105.1 | 3 | 9 | 0 | 128 | 71 | 64 | 35 | 6.07 | 5.34 | 1.55 | 5.5 | 3.0 | 145 | 128 | -0.2 | |
| 2025 | AZ | 33 | 33 | 192.0 | 13 | 15 | 0 | 176 | 103 | 175 | 66 | 4.83 | 4.50 | 1.26 | 8.2 | 3.1 | 116 | 108 | 1.6 | |
| 2024 | AZ | 28 | 28 | 148.0 | 14 | 6 | 0 | 133 | 60 | 156 | 54 | 3.65 | 3.38 | 1.26 | 9.5 | 3.3 | 89 | 83 | 3.1 | |
| 2023 | AZ | 34 | 34 | 210.0 | 17 | 9 | 0 | 188 | 81 | 220 | 47 | 3.47 | 3.26 | 1.12 | 9.4 | 2.0 | 80 | 75 | 5.0 | |
| 2022 | AZ | 31 | 31 | 184.0 | 12 | 4 | 0 | 121 | 52 | 192 | 47 | 2.54 | 3.05 | 0.91 | 9.4 | 2.3 | 64 | 77 | 4.2 | |
| 2021 | AZ | 23 | 23 | 121.1 | 4 | 10 | 0 | 108 | 58 | 139 | 49 | 4.30 | 4.25 | 1.29 | 10.3 | 3.6 | 101 | 100 | 1.6 | |
| 2020 | AZ | 12 | 12 | 72.0 | 3 | 2 | 0 | 55 | 22 | 82 | 25 | 2.75 | 3.66 | 1.11 | 10.3 | 3.1 | 62 | 82 | 1.6 | |
| 2019 | AZ/MIA | 15 | 15 | 80.0 | 3 | 6 | 0 | 62 | 25 | 96 | 36 | 2.81 | 3.61 | 1.23 | 10.8 | 4.0 | 62 | 80 | 1.7 |
Batting
Standard and advanced, by season.
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 | 252 | 227 | 70 | 9 | 18 | 27 | .308 | .365 | .498 | .376 | 10.7% |
| vs RHB | 220 | 202 | 58 | 10 | 17 | 37 | .287 | .342 | .500 | .364 | 16.8% |
Pitch sequencing
What Zac Gallen throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Zac Gallen throws in it.
Pitch arsenal
What he throws, how hard, how often it misses, and what hitters do with it.
| Four-Seam Fastball | 626 | 93.4 | 2,310 | 44.7% | 6.4% | 152 | .322 | .894 | |
| Slider | 410 | 88.9 | 2,351 | 40.0% | 28.6% | 107 | .290 | .871 | |
| Knuckle Curve | 340 | 81.6 | 2,430 | 43.2% | 23.4% | 75 | .360 | .994 | |
| Changeup | 304 | 86.6 | 1,541 | 38.8% | 26.8% | 71 | .141 | .388 | |
| Sinker | 99 | 92.7 | 2,176 | 49.5% | 7.8% | 21 | .476 | 1.427 |
Head to head
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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.