Mark Leiter Jr.
Relief Pitcher
#38
Player card
Mark Leiter Jr.
Movement: FlatConfidence: WatchBased on: season profile
Mark Leiter Jr. rates 40/100 because the model is pricing 29.2 innings, 0 strikeouts, a 4.85 ERA, and a 1.38 WHIP for Oakland Athletics. The call weighs production, role, momentum, availability, and ceiling; strongest inputs: STRIKEOUTS, COMMAND, RUN PREVENTION. Rafters value call is Watch with the movement label flat today. The caveat: role security keeps the call capped, availability is the main drag, no daily lift yet.
How to read this cardPitcher lens: innings, strikeouts, ERA/WHIP prevention, recent workload, and role shape the value call.
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2026 · pitching
2026 · pitching
| GP | GS | W | L | ERA | WHIP | IP | K | BB | SV | HLD |
|---|---|---|---|---|---|---|---|---|---|---|
| 32 | 0 | 0 | 1 | 4.85 | 1.38 | 29.2 | 31 | 10 | 4 | 5 |
Career Snapshot
pitching · 2017–2026
| GP | GS | W | L | W% | WAR | ERA | WHIP | IP | K | BB | K/BB | H | R | ER | SV | HLD | BLSV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 302 | 15 | 16 | 30 | .348 | — | 4.62 | 1.33 | 382.0 | 427 | 141 | 3.0 | 368 | 227 | 196 | 13 | 67 | 16 |
Postseason Pitching · 2024
| GP | W | W% | ERA | WHIP | IP | K | BB | K/BB | H | R | ER | HLD | BLSV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 6 | 1 | 1.000 | 1.69 | 1.50 | 5.1 | 5 | 5 | 1.0 | 3 | 1 | 1 | 1 | 1 |
Opponent Batting · 2017–2026
| P | TBF | P-TBF | OBA | OOBP | OSLUG | OOPS | 2B | 3B | HR | TB | RBI | BH | SH | SF | IBB |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 6448 | 1671 | 3.859 | .248 | .324 | .418 | .742 | 63 | 9 | 57 | 620 | 225 | 32 | 2 | 11 | 9 |
Expanded Pitching · 2017–2026
| P/S | P/I | K/9 | QS | GB | FB | G/F | IR | IRS | WP | BK | SB | CS | RSUP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 118.9 | 16.9 | 10.1 | 4 | 505 | 565 | 0.9 | 124 | 51 | 27 | 1 | 46 | 7 | 66.0 |
Season by Season
pitching
| Season | Team | GP | GS | W | L | W% | WAR | ERA | WHIP | IP | K | BB | K/BB | H | R | ER | SV | HLD | BLSV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2017 | Philadelphia Phillies | 27 | 11 | 3 | 6 | .333 | -0.1 | 4.96 | 1.33 | 90.2 | 84 | 31 | 2.7 | 90 | 59 | 50 | 0 | 0 | 0 |
| 2018 | Philadelphia Phillies | 12 | 0 | 0 | 1 | .000 | -0.5 | 5.40 | 1.80 | 16.2 | 13 | 8 | 1.6 | 22 | 17 | 10 | 0 | 0 | 0 |
| 2018 | Toronto Blue Jays | 8 | 0 | 0 | 0 | .000 | -0.6 | 13.50 | 2.55 | 6.2 | 9 | 4 | 2.3 | 13 | 11 | 10 | 0 | 1 | 0 |
| 2018 | 2018 Totals | 20 | 0 | 0 | 1 | .000 | -1.1 | 7.71 | 2.01 | 23.1 | 22 | 12 | 1.8 | 35 | 28 | 20 | 0 | 1 | 0 |
| 2022 | Chicago Cubs | 35 | 4 | 2 | 7 | .222 | 0.8 | 3.99 | 1.14 | 67.2 | 73 | 25 | 2.9 | 52 | 32 | 30 | 3 | 4 | 3 |
| 2023 | Chicago Cubs | 69 | 0 | 1 | 3 | .250 | 1.0 | 3.50 | 1.12 | 64.1 | 77 | 24 | 3.2 | 48 | 27 | 25 | 4 | 28 | 4 |
| 2024 | Chicago Cubs | 39 | 0 | 2 | 4 | .333 | -0.3 | 4.21 | 1.10 | 36.1 | 53 | 13 | 4.1 | 27 | 20 | 17 | 0 | 13 | 2 |
| 2024 | New York Yankees | 21 | 0 | 2 | 1 | .667 | -0.1 | 4.98 | 1.71 | 21.2 | 33 | 9 | 3.7 | 28 | 14 | 12 | 0 | 2 | 1 |
| 2024 | 2024 Totals | 60 | 0 | 4 | 5 | .444 | -0.4 | 4.50 | 1.33 | 58.0 | 86 | 22 | 3.9 | 55 | 34 | 29 | 0 | 15 | 3 |
| 2025 | New York Yankees | 59 | 0 | 6 | 7 | .462 | -0.6 | 4.84 | 1.53 | 48.1 | 54 | 17 | 3.2 | 57 | 31 | 26 | 2 | 14 | 4 |
| 2026 | Athletics | 32 | 0 | 0 | 1 | .000 | 0.2 | 4.85 | 1.38 | 29.2 | 31 | 10 | 3.1 | 31 | 16 | 16 | 4 | 5 | 2 |
Postseason Pitching
| Season | Team | GP | GS | W | L | W% | WAR | ERA | WHIP | IP | K | BB | K/BB | H | R | ER | SV | HLD | BLSV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | New York Yankees | 6 | 0 | 1 | 0 | 1.000 | 0.0 | 1.69 | 1.50 | 5.1 | 5 | 5 | 1.0 | 3 | 1 | 1 | 0 | 1 | 1 |
Opponent Batting
| Season | Team | P | TBF | P-TBF | OBA | OOBP | OSLUG | OOPS | 2B | 3B | HR | TB | RBI | BH | SH | SF | IBB |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2017 | Philadelphia Phillies | 1510 | 395 | 3.823 | .254 | .325 | .460 | .785 | 15 | 2 | 18 | 163 | 52 | 7 | 1 | 2 | 2 |
| 2018 | Philadelphia Phillies | 317 | 84 | 3.774 | .297 | .369 | .568 | .937 | 5 | 0 | 5 | 42 | 18 | 1 | 0 | 1 | 2 |
| 2018 | Toronto Blue Jays | 151 | 39 | 3.872 | .394 | .462 | .636 | 1.098 | 0 | 1 | 2 | 21 | 9 | 1 | 0 | 1 | 1 |
| 2018 | 2018 Totals | 468 | 123 | 3.805 | .327 | .398 | .589 | .987 | 5 | 1 | 7 | 63 | 27 | 2 | 0 | 2 | 3 |
| 2022 | Chicago Cubs | 1086 | 282 | 3.851 | .210 | .298 | .375 | .673 | 7 | 2 | 10 | 93 | 32 | 7 | 0 | 2 | 2 |
| 2023 | Chicago Cubs | 1056 | 269 | 3.926 | .206 | .299 | .365 | .663 | 12 | 2 | 7 | 85 | 35 | 8 | 1 | 3 | 0 |
| 2024 | Chicago Cubs | 582 | 152 | 3.829 | .196 | .270 | .261 | .531 | 1 | 1 | 2 | 36 | 12 | 1 | 0 | 0 | 0 |
| 2024 | New York Yankees | 433 | 104 | 4.163 | .301 | .375 | .581 | .956 | 8 | 0 | 6 | 54 | 16 | 2 | 0 | 0 | 1 |
| 2024 | 2024 Totals | 1015 | 256 | 3.965 | .238 | .313 | .390 | .702 | 9 | 1 | 8 | 90 | 28 | 3 | 0 | 0 | 1 |
| 2025 | New York Yankees | 832 | 219 | 3.799 | .289 | .356 | .426 | .783 | 10 | 1 | 5 | 84 | 35 | 4 | 0 | 1 | 0 |
| 2026 | Athletics | 481 | 127 | 3.787 | .270 | .331 | .365 | .696 | 5 | 0 | 2 | 42 | 16 | 1 | 0 | 1 | 1 |
Expanded Pitching
| Season | Team | P/S | P/I | K/9 | QS | CG | SHO | GSC | GB | FB | G/F | IR | IRS | WP | BK | SB | CS | RSUP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2017 | Philadelphia Phillies | 137.3 | 16.7 | 8.3 | 4 | 0 | 0 | 46.7 | 135 | 138 | 1.0 | 5 | 3 | 3 | 0 | 10 | 2 | 48.0 |
| 2018 | Philadelphia Phillies | 0.0 | 19.0 | 7.0 | 0 | 0 | 0 | 0.0 | 31 | 30 | 1.0 | 3 | 3 | 0 | 0 | 2 | 0 | 0.0 |
| 2018 | Toronto Blue Jays | 0.0 | 22.7 | 12.2 | 0 | 0 | 0 | 0.0 | 9 | 16 | 0.6 | 2 | 2 | 2 | 0 | 2 | 0 | 0.0 |
| 2018 | 2018 Totals | 0.0 | 20.1 | 8.5 | 0 | 0 | 0 | 0.0 | 40 | 46 | 0.9 | 5 | 5 | 2 | 0 | 4 | 0 | 0.0 |
| 2022 | Chicago Cubs | 68.3 | 16.0 | 9.7 | 0 | 0 | 0 | 41.8 | 87 | 90 | 1.0 | 14 | 5 | 5 | 0 | 6 | 2 | 18.0 |
| 2023 | Chicago Cubs | 0.0 | 16.4 | 10.8 | 0 | 0 | 0 | 0.0 | 74 | 86 | 0.9 | 31 | 13 | 2 | 1 | 9 | 1 | 0.0 |
| 2024 | Chicago Cubs | 0.0 | 16.0 | 13.1 | 0 | 0 | 0 | 0.0 | 43 | 42 | 1.0 | 21 | 3 | 2 | 0 | 4 | 0 | 0.0 |
| 2024 | New York Yankees | 0.0 | 20.0 | 13.7 | 0 | 0 | 0 | 0.0 | 24 | 36 | 0.7 | 7 | 4 | 3 | 0 | 2 | 0 | 0.0 |
| 2024 | 2024 Totals | 0.0 | 17.5 | 13.3 | 0 | 0 | 0 | 0.0 | 67 | 78 | 0.9 | 28 | 7 | 5 | 0 | 6 | 0 | 0.0 |
| 2025 | New York Yankees | 0.0 | 17.2 | 10.1 | 0 | 0 | 0 | 0.0 | 68 | 76 | 0.9 | 36 | 15 | 8 | 0 | 7 | 1 | 0.0 |
| 2026 | Athletics | 0.0 | 16.2 | 9.4 | 0 | 0 | 0 | 0.0 | 34 | 51 | 0.7 | 5 | 3 | 2 | 0 | 4 | 1 | 0.0 |
Latest News
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