Pitcher · 2026
Jonathan Heasley
- Age
- 29
- B/T
- R/R
- Height
- 6' 3"
- Weight
- 225 lb
- Number
- #68
- Born
- January 27, 1997 in Charlotte, NC, USA
- MLB debut
- September 17, 2021
- Drafted
- 2018, round 13
- College
- Oklahoma State
- High school
- Prestonwood Christian Academy
- dbWAR
- -.4 2 season(s)
- IP
- 4.0
- ERA
- 11.25
- FIP
- 8.59
- K/9
- 4.5
- FIP−
- 206 100 = avg
Jonathan Heasley is a relief pitcher for the Tampa Bay Rays. In 2026 he struck out 2 batters over 4.0 innings across 1 appearance, going 0-0. His ERA of 11.25 was 169.4% higher than the league average of 4.18. Stripping out defence, his 8.59 FIP suggests he pitched better than his ERA shows. He missed bats on 7.9% of swings (4.7% of every pitch he threw), walked 0.0% 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 | 8 | 8 | 5 | 1 | 0 | 1 | .625 | .625 | 1.125 | .744 | 12.5% |
| vs RHB | 11 | 11 | 3 | 1 | 0 | 1 | .273 | .273 | .636 | .379 | 9.1% |
Pitch sequencing
What Jonathan Heasley throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Jonathan Heasley throws in it.
Pitch arsenal
What he throws, how hard, and how often it misses in 2026.
| Four-Seam Fastball | 25 | 91.4 | 2,100 | 52.0% | 5.3% | |
| Slider | 21 | 83.2 | 2,018 | 38.1% | 10.0% | |
| Changeup | 12 | 84.2 | 1,314 | 50.0% | 16.7% |
Pitching
Standard and advanced, by season.
| Trend | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 1 | 0 | 4.0 | 0 | 0 | 0 | 8 | 5 | 2 | 0 | 11.25 | 8.59 | 2.00 | 4.5 | 0.0 | 269 | 206 | -0.2 | |
| 2024 | 4 | 0 | 5.1 | 0 | 1 | 0 | 10 | 10 | 4 | 3 | 16.88 | 8.79 | 2.44 | 6.8 | 5.1 | 414 | 216 | -0.3 |
Head to head
Put Jonathan Heasley 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.