Players · B · Pitcher · 2026 regular season
Jonathan Bowlan
- Age
- 30
- B/T
- R/R
- Height
- 6' 6"
- Weight
- 240 lb
- Number
- #52
- Born
- December 1, 1996 in Arlington, TN, United States
- MLB debut
- September 27, 2023
- Drafted
- 2018, round 2
- College
- Memphis
Compare with…vs Evan Phillipsvs Andrés Muñozvs Trevor Williams
- dbWAR
- .8 Regular season, 4 season(s)
- IP
- 56.1
- ERA
- 3.36
- FIP
- 3.37
- K/9
- 11.7
- FIP−
- 81 100 = avg
Jonathan Bowlan is a relief pitcher for the Philadelphia Phillies. In 2026 he struck out 73 batters over 56.1 innings across 59 appearances, going 2-2. His ERA of 3.36 was 19.8% lower than the league average of 4.18 — 5th of 17 on his team, and 145th of 539 among MLB pitchers with 20+ innings. Stripping out defence, his 3.37 FIP suggests the ERA was no fluke. He missed bats on 31.4% of swings (15.7% of every pitch he threw), walked 6.6% of the batters he faced and struck out 31.9%. His 0.9 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 regular season.
WAR by season
Pitching Regular season
Standard and advanced, by season. Regular-season games only — postseason games are listed separately below.
Separate from the regular season
Postseason Postseason
Wild Card through World Series. These games are counted on their own: none of them are in the regular-season tables, career totals, league context, leaderboards or dbWAR on this page.
Postseason pitching
| Season | Team | Round | G | GS | IP | W | L | SV | H | ER | HR | BB | SO | ERA | WHIP | K/9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 Post | PHI | Wild Card · through Oct 1 | 1 | 0 | 1.0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 9.00 | 1.00 | 0.0 |
Box-score and rate statistics only. wOBA, wRC+, FIP and dbWAR are measured against a full league season, and a postseason is a few teams playing each other for a month, so they are not computed for October.
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 | 124 | 109 | 20 | 3 | 11 | 37 | .183 | .266 | .284 | .254 | 29.8% |
| vs RHB | 105 | 99 | 23 | 5 | 4 | 36 | .232 | .276 | .424 | .305 | 34.3% |
Pitch sequencing
What Jonathan Bowlan 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 Bowlan throws in it.
Pitch arsenal
What he throws, how hard, how often it misses, and what hitters do with it.
| Four-Seam Fastball | 463 | 97.1 | 2,412 | 59.8% | 37.0% | 86 | .116 | .422 | |
| Slider | 177 | 86.8 | 2,488 | 44.6% | 34.8% | 46 | .174 | .546 | |
| Changeup | 128 | 90.5 | 1,583 | 36.7% | 29.9% | 36 | .250 | .769 | |
| Sinker | 107 | 97.2 | 2,299 | 48.6% | 5.6% | 27 | .370 | .804 | |
| Sweeper | 76 | 84.8 | 2,593 | 31.6% | 26.9% | 15 | .333 | 1.067 |
Compare Jonathan Bowlan with…
Side by side with up to three others.
Or read one already written — Jonathan Bowlan against:
- Evan Phillipssimilar 2026 seasons
- Andrés Muñozsimilar 2026 seasons
- Trevor Williamssimilar 2026 seasons
- Jack Dreyersimilar 2026 seasons
- Dylan Doddsimilar 2026 seasons
- Calvin Fauchersimilar 2025 seasons
- Grant Andersonsimilar 2025 seasons
- Lake Bacharsimilar 2025 seasons
- Juan Mejiasimilar 2025 seasons
- Mason Fluhartysimilar 2025 seasons
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.