Pitcher · 2026
Janson Junk
- Age
- 30
- B/T
- R/R
- Height
- 6' 2"
- Weight
- 197 lb
- Number
- #26
- Born
- January 15, 1996 in Federal Way, WA, USA
- MLB debut
- September 5, 2021
- Drafted
- 2017, round 22
- College
- Seattle
- dbWAR
- 2.6 3 season(s)
- IP
- 81.2
- ERA
- 4.63
- FIP
- 4.36
- K/9
- 6.8
- FIP−
- 104 100 = avg
Janson Junk is a starting pitcher for the Miami Marlins. In 2026 he struck out 62 batters over 81.2 innings across 16 appearances, 16 of them starts, going 5-7. His ERA of 4.63 was 10.8% higher than the league average of 4.18 — 11th of 16 on his team, and 319th of 467 among MLB pitchers with 20+ innings. Stripping out defence, his 4.36 FIP suggests the ERA was no fluke. He missed bats on 16.1% of swings (7.8% of every pitch he threw), walked 6.6% of the batters he faced and struck out 17.7%. His 0.7 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 | 219 | 200 | 64 | 6 | 16 | 40 | .320 | .370 | .490 | .375 | 18.3% |
| vs RHB | 131 | 123 | 24 | 6 | 7 | 22 | .195 | .238 | .366 | .264 | 16.8% |
Pitch sequencing
What Janson Junk throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Janson Junk throws in it.
Pitch arsenal
What he throws, how hard, and how often it misses in 2026.
| Four-Seam Fastball | 482 | 94.2 | 2,335 | 51.9% | 11.6% | |
| Slider | 273 | 86.4 | 2,432 | 45.1% | 16.3% | |
| Changeup | 241 | 87.3 | 1,403 | 39.8% | 28.6% | |
| Sweeper | 176 | 80.2 | 2,394 | 44.9% | 16.0% | |
| Curveball | 89 | 80.8 | 2,498 | 37.1% | 14.7% | |
| Sinker | 54 | 93.5 | 2,232 | 38.9% | 6.3% |
Pitching
Standard and advanced, by season.
| Trend | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 16 | 16 | 81.2 | 5 | 7 | 0 | 88 | 42 | 62 | 23 | 4.63 | 4.36 | 1.36 | 6.8 | 2.5 | 111 | 104 | 0.7 | |
| 2025 | 21 | 16 | 110.0 | 6 | 4 | 1 | 112 | 51 | 77 | 13 | 4.17 | 3.14 | 1.14 | 6.3 | 1.1 | 100 | 76 | 2.2 | |
| 2024 | 6 | 0 | 8.0 | 0 | 0 | 0 | 22 | 13 | 8 | 4 | 14.63 | 7.54 | 3.25 | 9.0 | 4.5 | 359 | 185 | -0.3 |
Head to head
Put Janson Junk 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.