Pitcher · 2026
John Klein
- Age
- 24
- B/T
- R/R
- Height
- 6' 5"
- Weight
- 225 lb
- Born
- April 22, 2002 in Brooklyn Park, MN, USA
- MLB debut
- May 2, 2026
- College
- Iowa Central CC
- dbWAR
- -.2 1 season(s)
- IP
- 4.1
- ERA
- 4.15
- FIP
- 7.93
- K/9
- 4.2
- FIP−
- 190 100 = avg
John Klein is a relief pitcher for the Minnesota Twins. In 2026 he struck out 2 batters over 4.1 innings across 3 appearances, going 0-1. His ERA of 4.15 was 0.5% lower than the league average of 4.18. Stripping out defence, his 7.93 FIP suggests that his ERA had some help behind him. He missed bats on 10.3% of swings (4.9% of every pitch he threw), walked 21.1% of the batters he faced and struck out 10.5%. 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.
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 | 11 | 7 | 2 | 1 | 3 | 1 | .286 | .455 | .857 | .495 | 9.1% |
| vs RHB | 8 | 7 | 1 | 0 | 1 | 1 | .143 | .250 | .143 | .202 | 12.5% |
Pitch sequencing
What John Klein throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what John Klein throws in it.
Pitch arsenal
What he throws, how hard, and how often it misses in 2026.
| Four-Seam Fastball | 41 | 94.9 | 2,391 | 51.2% | 10.5% | |
| Changeup | 23 | 86.4 | 1,557 | 34.8% | 18.2% |
Pitching
Standard and advanced, by season.
| Trend | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 3 | 0 | 4.1 | 0 | 1 | 0 | 3 | 2 | 2 | 4 | 4.15 | 7.93 | 1.62 | 4.2 | 8.3 | 99 | 190 | -0.2 | — |
Head to head
Put John Klein 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.