Athletics· #38· Pitcher
Mark Leiter Jr. “Junior”
Bats R · Throws R·Age 35 (Mar 13, 1991)·6' 0", 210 lb·Fort Lauderdale, FL, USA
2026 Pitching
ERA
4.41
WHIP
1.29
IP
32.2
K%
26.1
BB%
7.2
K/9
9.92
W-L
0-1
GS
0
SV
4
HLD
5
DiamondIQ WAR
32.7 IP · 2026
0.8
7.9 runs above replacement
FIP · 2.88 (park 1.09)0.0
vs replacement · RP, 32.7 IP+7.9
FIP-based runs above replacement, park-adjusted, scaled by innings over runs-per-win. Reliever leverage is simplified (v1). Full methodology.
Pitch Arsenal · Statcast
Splitter34% · 84.3 · 46% whiff
Sinker26% · 92.2 · 13% whiff
Curveball19% · 74.0 · 33% whiff
Four-Seam12% · 92.2 · 8% whiff
Cutter9% · 89.8 · 21% whiff
Slider1% · 82.5 · 0% whiff
Career Pitching
| Yr | Tm | W | L | ERA | G | GS | SV | IP | SO | BB | WHIP | K/9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | Athletics | 0 | 1 | 4.41 | 35 | 0 | 4 | 32.2 | 36 | 10 | 1.29 | 9.92 |
| 2025 | New York Yankees | 6 | 7 | 4.84 | 59 | 0 | 2 | 48.1 | 54 | 17 | 1.53 | 10.06 |
| 2024 | — | 4 | 5 | 4.50 | 60 | 0 | 0 | 58.0 | 86 | 22 | 1.33 | 13.34 |
| 2024 | New York Yankees | 2 | 1 | 4.98 | 21 | 0 | 0 | 21.2 | 33 | 9 | 1.71 | 13.71 |
| 2024 | Chicago Cubs | 2 | 4 | 4.21 | 39 | 0 | 0 | 36.1 | 53 | 13 | 1.10 | 13.13 |
Recent Games
Jul 12 @ Chicago White SoxL
1.0 IP, 0 ER, 1 K, 0 BB
Jul 9 @ Detroit TigersL
1.0 IP, 0 ER, 2 K, 0 BB
Jul 3 vs Miami MarlinsL
1.0 IP, 0 ER, 2 K, 0 BB
Jun 16 vs Pittsburgh PiratesL
1.0 IP, 0 ER, 0 K, 0 BB
Jun 13 vs Colorado RockiesW
1.0 IP, 0 ER, 1 K, 0 BB
Jun 8 vs Milwaukee BrewersL
0.1 IP, 1 ER, 1 K, 2 BB
Jun 7 @ Houston AstrosW
1.0 IP, 0 ER, 2 K, 0 BB
Jun 4 @ Chicago CubsL
1.0 IP, 0 ER, 2 K, 0 BB
Jun 3 @ Chicago CubsW
0.2 IP, 0 ER, 0 K, 0 BB
May 31 vs New York YankeesL
1.0 IP, 0 ER, 0 K, 1 BB