Players · L · Pitcher · 2026 regular season
Mark Leiter Jr.
- Age
- 35
- B/T
- R/R
- Height
- 6' 0"
- Weight
- 210 lb
- Number
- #38
- Born
- March 13, 1991 in Fort Lauderdale, FL, United States
- MLB debut
- April 28, 2017
- Drafted
- 2013, round 22
- College
- New Jersey Institute of Technology
- High school
- Toms River North
- Salary, 2026
- $2.85M
Compare with…vs Grant Wolframvs Wilber Dotelvs Andrew Morris
- dbWAR
- 2.4 Regular season, 9 season(s)
- IP
- 33.2
- ERA
- 4.28
- FIP
- 2.95
- K/9
- 10.2
- FIP−
- 71 100 = avg
Mark Leiter Jr. is a relief pitcher for the Athletics. In 2026 he struck out 38 batters over 33.2 innings across 36 appearances, going 0-1. His ERA of 4.28 was 2.3% higher than the league average of 4.18 — 7th of 18 on his team, and 307th of 539 among MLB pitchers with 20+ innings. Stripping out defence, his 2.95 FIP suggests he pitched better than his ERA shows. He missed bats on 30.3% of swings (14.0% of every pitch he threw), walked 7.6% of the batters he faced and struck out 26.4%. His 0.8 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.
| Trend | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | ATH | 36 | 0 | 33.2 | 0 | 1 | 4 | 33 | 16 | 38 | 11 | 4.28 | 2.95 | 1.31 | 10.2 | 2.9 | 102 | 71 | 0.8 | |
| 2025 | NYY | 59 | 0 | 48.1 | 6 | 7 | 2 | 57 | 26 | 54 | 17 | 4.84 | 3.55 | 1.53 | 10.1 | 3.2 | 116 | 85 | 0.6 | |
| 2024 | CHC/NYY | 60 | 0 | 58.0 | 4 | 5 | 0 | 55 | 29 | 86 | 22 | 4.50 | 3.29 | 1.33 | 13.3 | 3.4 | 110 | 81 | 0.8 | |
| 2023 | CHC | 69 | 0 | 64.1 | 1 | 3 | 4 | 48 | 25 | 77 | 24 | 3.50 | 3.77 | 1.12 | 10.8 | 3.4 | 81 | 87 | 0.8 | |
| 2022 | CHC | 35 | 4 | 67.2 | 2 | 7 | 3 | 52 | 30 | 73 | 25 | 3.99 | 4.29 | 1.14 | 9.7 | 3.3 | 101 | 108 | 0.2 | |
| 2018 | PHI/TOR | 20 | 0 | 23.1 | 0 | 1 | 0 | 35 | 20 | 22 | 12 | 7.71 | 6.97 | 2.01 | 8.5 | 4.6 | 186 | 168 | -0.6 | |
| 2017 | PHI | 27 | 11 | 90.2 | 3 | 6 | 0 | 90 | 50 | 84 | 31 | 4.96 | 5.14 | 1.33 | 8.3 | 3.1 | 114 | 118 | 0.0 |
Batting 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 Post | NYY | Postseason total | 6 | 0 | 5.1 | 1 | 0 | 0 | 3 | 1 | 0 | 5 | 5 | 1.69 | 1.50 | 8.4 |
| ALCS | 2 | 0 | 2.1 | 1 | 0 | 0 | 2 | 1 | 0 | 3 | 2 | 3.86 | 2.14 | 7.7 | ||
| World Series | 4 | 0 | 3.0 | 0 | 0 | 0 | 1 | 0 | 0 | 2 | 3 | 0.00 | 1.00 | 9.0 |
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 | 87 | 76 | 18 | 0 | 9 | 28 | .237 | .333 | .276 | .284 | 32.2% |
| vs RHB | 57 | 52 | 15 | 2 | 2 | 10 | .288 | .333 | .442 | .339 | 17.5% |
Pitch sequencing
What Mark Leiter Jr. throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Mark Leiter Jr. throws in it.
Pitch arsenal
What he throws, how hard, how often it misses, and what hitters do with it.
| Splitter | 181 | 84.3 | 741 | 47.0% | 45.7% | 54 | .185 | .465 | |
| Sinker | 144 | 92.1 | 2,016 | 51.4% | 13.3% | 33 | .212 | .490 | |
| Curveball | 106 | 73.9 | 2,316 | 50.9% | 34.9% | 16 | .250 | .833 | |
| Four-Seam Fastball | 64 | 92.2 | 1,968 | 34.4% | 7.7% | 15 | .333 | .874 | |
| Cutter | 51 | 89.6 | 2,120 | 49.0% | 25.0% | 9 | — | — |
Compare Mark Leiter Jr. with…
Side by side with up to three others.
Or read one already written — Mark Leiter Jr. against:
- Grant Wolframsimilar 2026 seasons
- Wilber Dotelsimilar 2026 seasons
- Andrew Morrissimilar 2026 seasons
- Enmanuel De Jesussimilar 2026 seasons
- Dietrich Ennssimilar 2025 seasons
- Gregory Sotosimilar 2025 seasons
- Zack Kellysimilar 2025 seasons
- Angel Zerpasimilar 2025 seasons
- Caleb Boushleysimilar 2025 seasons
- Jake Birdsimilar 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.