Players · R · Pitcher · 2026 regular season
Jack Ralston
- Age
- 29
- B/T
- R/R
- Height
- 6' 6"
- Weight
- 231 lb
- Number
- #79
- Born
- August 13, 1997 in Panorama City, CA, United States
- MLB debut
- August 23, 2026
- Drafted
- 2019, round 7
- College
- UCLA
- High school
- Hart
- dbWAR
- -.3 Regular season, 1 season(s)
- IP
- 17.1
- ERA
- 5.71
- FIP
- 6.39
- K/9
- 9.9
- FIP−
- 153 100 = avg
Jack Ralston is a relief pitcher for the Miami Marlins. In 2026 he struck out 19 batters over 17.1 innings across 16 appearances, going 0-3. His ERA of 5.71 was 36.6% higher than the league average of 4.18. Stripping out defence, his 6.39 FIP suggests that his ERA had some help behind him. He missed bats on 17.6% of swings (6.7% of every pitch he threw), walked 13.0% of the batters he faced and struck out 24.7%. His -0.3 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.
Pitching Regular season
Standard and advanced, by season. Regular-season games only.
| Trend | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | MIA | 16 | 1 | 17.1 | 0 | 3 | 0 | 15 | 11 | 19 | 10 | 5.71 | 6.39 | 1.44 | 9.9 | 5.2 | 137 | 153 | -0.3 | — |
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 | 53 | 44 | 9 | 3 | 7 | 11 | .205 | .308 | .500 | .338 | 20.8% |
| vs RHB | 24 | 21 | 6 | 2 | 3 | 8 | .286 | .375 | .571 | .408 | 33.3% |
Pitch sequencing
What Jack Ralston throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Jack Ralston throws in it.
Pitch arsenal
What he throws, how hard, how often it misses, and what hitters do with it.
| Splitter | 159 | 82.5 | 905 | 42.1% | 23.1% | 40 | .275 | .818 | |
| Four-Seam Fastball | 83 | 93.6 | 2,233 | 54.2% | 16.7% | 15 | .133 | .648 | |
| Slider | 70 | 85.4 | 2,006 | 48.6% | 4.2% | 10 | — | — |
Compare Jack Ralston with…
Side by side with 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.