Pitcher · 2025
A.J. Puk
- Age
- 30
- B/T
- L/L
- Height
- 6' 7"
- Weight
- 248 lb
- Number
- #33
- Born
- April 25, 1995 in Minneapolis, MN, USA
- MLB debut
- August 21, 2019
- Drafted
- 2016, round 1
- College
- Florida
- High school
- Washington
- Salary, 2025
- $2.95M
- dbWAR
- 1.4 2 season(s)
- IP
- 8.0
- ERA
- 3.38
- FIP
- 4.51
- K/9
- 13.5
- FIP−
- 108 100 = avg
A.J. Puk is a relief pitcher for the Arizona Diamondbacks. In 2025 he struck out 12 batters over 8.0 innings across 8 appearances, going 0-0. His ERA of 3.38 was 18.8% lower than the league average of 4.16. Stripping out defence, his 4.51 FIP suggests that his ERA had some help behind him. He missed bats on 32.5% of swings (17.3% of every pitch he threw), walked 5.7% of the batters he faced and struck out 34.3%. His 0.0 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, 2025.
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 | 13 | 13 | 3 | 1 | 0 | 6 | .231 | .231 | .538 | .319 | 46.2% |
| vs RHB | 22 | 19 | 5 | 1 | 2 | 6 | .263 | .364 | .526 | .385 | 27.3% |
Pitch sequencing
What A.J. Puk throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what A.J. Puk throws in it.
Pitch arsenal
What he throws, how hard, and how often it misses in 2025.
| Four-Seam Fastball | 97 | 96.4 | 2,299 | 63.9% | 31.6% | |
| Slider | 57 | 85.4 | 2,297 | 42.1% | 34.6% |
Pitching
Standard and advanced, by season.
| Trend | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | 8 | 0 | 8.0 | 0 | 0 | 4 | 8 | 3 | 12 | 2 | 3.38 | 4.51 | 1.25 | 13.5 | 2.3 | 81 | 108 | 0.0 | |
| 2024 | 62 | 4 | 71.1 | 4 | 9 | 3 | 51 | 25 | 88 | 28 | 3.15 | 2.87 | 1.11 | 11.1 | 3.5 | 77 | 70 | 1.4 |
Head to head
Put A.J. Puk beside up to three others.
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.