Pitcher · 2025
Kyle Nelson
- Age
- 29
- B/T
- L/L
- Height
- 6' 1"
- Weight
- 175 lb
- Number
- #90
- Born
- July 8, 1996 in San Francisco, CA, USA
- MLB debut
- September 10, 2020
- Drafted
- 2017, round 15
- College
- UC Santa Barbara
- High school
- Galileo
- Salary, 2025
- $825,000
- dbWAR
- -.3 2 season(s)
- IP
- 2.0
- ERA
- 9.00
- FIP
- 13.64
- K/9
- 9.0
- FIP−
- 328 100 = avg
Kyle Nelson is a relief pitcher for the Arizona Diamondbacks. In 2025 he struck out 2 batters over 2.0 innings across 3 appearances, going 0-0. His ERA of 9.00 was 116.4% higher than the league average of 4.16. Stripping out defence, his 13.64 FIP suggests that his ERA had some help behind him. He missed bats on 26.7% of swings (9.1% of every pitch he threw), walked 36.4% of the batters he faced and struck out 18.2%. 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, 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 | 4 | 3 | 1 | 1 | 1 | 1 | .333 | .500 | 1.333 | .681 | 25.0% |
| vs RHB | 7 | 4 | 0 | 0 | 3 | 1 | .000 | .429 | .000 | .309 | 14.3% |
Pitch sequencing
What Kyle Nelson throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Kyle Nelson throws in it.
Pitch arsenal
What he throws, how hard, and how often it misses in 2025.
| Slider | 24 | 84.2 | 2,793 | 45.8% | 40.0% | |
| Four-Seam Fastball | 19 | 89.9 | 2,182 | 31.6% | 0.0% |
Pitching
Standard and advanced, by season.
| Trend | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | 3 | 0 | 2.0 | 0 | 0 | 1 | 1 | 2 | 2 | 4 | 9.00 | 13.64 | 2.50 | 9.0 | 18.0 | 216 | 328 | -0.2 | |
| 2024 | 11 | 0 | 10.2 | 0 | 0 | 0 | 8 | 5 | 8 | 4 | 4.22 | 5.23 | 1.13 | 6.8 | 3.4 | 103 | 128 | -0.1 |
Head to head
Put Kyle Nelson 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.