Players · J · 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, United States
- MLB debut
- September 5, 2021
- Drafted
- 2017, round 22
- College
- Seattle
- dbWAR
- 3.6 6 season(s)
- IP
- 119.0
- ERA
- 4.31
- FIP
- 4.13
- K/9
- 6.4
- FIP−
- 99 100 = avg
Janson Junk is a starting pitcher for the Miami Marlins. In 2026 he struck out 84 batters over 119.0 innings across 25 appearances, 24 of them starts, going 6-9. His ERA of 4.31 is 3.2% higher than the league average of 4.18 — 13th of 18 on his team, and 313th of 538 among MLB pitchers with 20+ innings. Stripping out defence, his 4.13 FIP suggests the ERA was no fluke. He missed bats on 15.2% of swings (7.4% of every pitch he threw), walked 6.3% of the batters he faced and struck out 16.6%. His 1.4 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 | MIA | 25 | 24 | 119.0 | 6 | 9 | 0 | 124 | 57 | 84 | 32 | 4.31 | 4.13 | 1.31 | 6.4 | 2.4 | 103 | 99 | 1.4 | |
| 2025 | MIA | 21 | 16 | 110.0 | 6 | 4 | 1 | 112 | 51 | 77 | 13 | 4.17 | 3.14 | 1.14 | 6.3 | 1.1 | 100 | 76 | 2.4 | |
| 2024 | MIL/OAK | 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 | |
| 2023 | MIL | 2 | 1 | 7.1 | 0 | 1 | 0 | 8 | 4 | 5 | 2 | 4.91 | 4.48 | 1.36 | 6.1 | 2.5 | 113 | 103 | 0.1 | |
| 2022 | LAA | 3 | 2 | 8.1 | 1 | 1 | 0 | 10 | 6 | 11 | 3 | 6.48 | 3.11 | 1.56 | 11.9 | 3.2 | 163 | 78 | 0.2 | |
| 2021 | LAA | 4 | 4 | 16.1 | 0 | 1 | 0 | 20 | 7 | 10 | 2 | 3.86 | 6.29 | 1.35 | 5.5 | 1.1 | 90 | 148 | -0.2 |
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 | 316 | 289 | 83 | 6 | 22 | 56 | .287 | .340 | .422 | .337 | 17.7% |
| vs RHB | 189 | 175 | 41 | 8 | 10 | 28 | .234 | .282 | .406 | .301 | 14.8% |
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, how often it misses, and what hitters do with it.
| Four-Seam Fastball | 661 | 94.1 | 2,344 | 52.3% | 12.3% | 151 | .252 | .712 | |
| Slider | 378 | 86.3 | 2,445 | 47.9% | 16.8% | 102 | .265 | .802 | |
| Changeup | 341 | 87.3 | 1,404 | 37.0% | 22.4% | 75 | .267 | .576 | |
| Sweeper | 277 | 80.1 | 2,420 | 44.4% | 13.4% | 78 | .269 | .813 | |
| Curveball | 180 | 80.8 | 2,513 | 40.6% | 15.6% | 35 | .257 | .697 | |
| Sinker | 78 | 93.6 | 2,246 | 38.5% | 7.1% | 23 | .391 | .851 |
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.