Mark Leiter Jr. played in Major League Baseball from 2017 to 2025, appearing in 270 games over 6 seasons. He recorded a total of 16 W and 29 L, an ERA of 4.6, 396 SO, a WHIP of 1.328, and a WAR of −0.5.
🧾 Basic Profile
 | |
| Name | Mark Leiter Jr. |
| Date of Birth | March 13, 1991 |
| Nationality |  United States |
| Position | Pitcher |
| Throws | Right |
| Bats | Right |
| MLB Debut | 2017 |
Mark Leiter Jr. Yearly Pitching Stats
This chart shows the season-by-season changes in ERA, SO, and IP for Mark Leiter Jr..
Parsing Data
Data Source: Baseball Reference
Image Source: Wikipedia
📊 Career Summary
Mark Leiter Jr. appeared in 270 games over 6 MLB seasons from 2017 to 2025. Below are his cumulative stats and MLB all-time rankings:
| GS | 15 (MLB Rank: 3,942) |
| GF | 50 (MLB Rank: 1,679) |
| W | 16 (MLB Rank: 3,332) |
| L | 29 (MLB Rank: 2,530) |
| SV | 9 (MLB Rank: 1,375) |
| ERA | 4.6 (MLB Rank: 6,425) |
| IP | 352.1 (MLB Rank: 3,247) |
| SO | 396 (MLB Rank: 1,991) |
| BB | 131 (MLB Rank: 3,294) |
| H | 337 (MLB Rank: 3,330) |
| HR | 55 (MLB Rank: 1,885) |
| SO9 | 10.12 (MLB Rank: 487) |
| BB9 | 3.35 (MLB Rank: 7,332) |
| H9 | 8.61 (MLB Rank: 8,568) |
| HR9 | 1.4 (MLB Rank: 2,033) |
| WHIP | 1.328 (MLB Rank: 8,915) |
| WAR | −0.5 (MLB Rank: 9,807) |
📊 Last Season Summary (2025)
In his final season (2025), Mark Leiter Jr. recorded the following stats:
| GS | 0 |
| GF | 11 |
| W | 6 |
| L | 7 |
| SV | 2 |
| ERA | 4.84 |
| IP | 48.1 |
| SO | 54 |
| BB | 17 |
| H | 57 |
| HR | 5 |
| SO9 | 10.06 |
| BB9 | 3.17 |
| H9 | 10.61 |
| HR9 | 0.93 |
| WHIP | 1.531 |
| WAR | −0.6 |
📈 Seasonal Highlights
- Most Wins: 2025, 6 W
- Most SO: 2024, 86 SO
- Most IP: 2017, 90.2 IP
- Best WAR: 2022, 0.9 WAR
- Best ERA: 2023, 3.51 ERA
🎯 Postseason Performance
Mark Leiter Jr. has no postseason appearances.
Mark Leiter Jr. Career Pitching Stats Overview
| season | W | L | ERA | W-L% | SV | SO | IP | WAR | WHIP | HR | H | BB | R | ER | ERA+ | FIP | SO9 | SO/BB | GS | G | GF | CG | SHO | HR9 | H9 | BB9 | BK | HBP | IBB | WP | BF |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2017 | 3 | 6 | 4.96 | 0.333 | 0 | 84 | 90.2 | -0.1 | 1.335 | 18 | 90 | 31 | 59 | 50 | 87 | 5.14 | 8.3 | 2.71 | 11 | 27 | 5 | 0 | 0 | 1.8 | 8.9 | 3.1 | 0 | 7 | 2 | 3 | 395 |
2018 | 0 | 1 | 7.71 | 0 | 0 | 22 | 23.1 | -1.1 | 2.014 | 7 | 35 | 12 | 28 | 20 | 55 | 6.97 | 8.5 | 1.83 | 0 | 20 | 4 | 0 | 0 | 2.7 | 13.5 | 4.6 | 0 | 2 | 3 | 2 | 123 |
2022 | 2 | 7 | 3.99 | 0.222 | 3 | 73 | 67.2 | 0.9 | 1.138 | 10 | 52 | 25 | 32 | 30 | 105 | 4.29 | 9.7 | 2.92 | 4 | 35 | 11 | 0 | 0 | 1.3 | 6.9 | 3.3 | 0 | 7 | 2 | 5 | 282 |
2023 | 1 | 3 | 3.5 | 0.25 | 4 | 77 | 64.1 | 0.8 | 1.119 | 7 | 48 | 24 | 27 | 25 | 122 | 3.77 | 10.8 | 3.21 | 0 | 69 | 12 | 0 | 0 | 1 | 6.7 | 3.4 | 1 | 8 | 0 | 2 | 269 |
2024 | 4 | 5 | 4.5 | 0.444 | 0 | 86 | 58 | -0.4 | 1.328 | 8 | 55 | 22 | 34 | 29 | 91 | 3.29 | 13.3 | 3.91 | 0 | 60 | 7 | 0 | 0 | 1.2 | 8.5 | 3.4 | 0 | 3 | 1 | 5 | 256 |
2025 | 6 | 7 | 4.84 | 0.462 | 2 | 54 | 48.1 | -0.6 | 1.531 | 5 | 57 | 17 | 31 | 26 | 84 | 3.55 | 10.1 | 3.18 | 0 | 59 | 11 | 0 | 0 | 0.9 | 10.6 | 3.2 | 0 | 4 | 0 | 8 | 219 |
