BIGLEAGUE

Athletics · Pitcher · #38

Mark Leiter Jr.

Age 356' 0" · 210lbBats R · Throws RDebut 2017From Fort Lauderdale

ERA

4.28

W-L

0-1

K

38

WHIP

1.31

WAR

0.6

FIP

2.94

Awards

2 major honors

All-Star

2015

Pitcher of the Month

2021

League Percentile

2026 season · percentile vs 290 relievers with 20+ IP
the entire league54relief pitchers290
ERA
36
4.28
WHIP
49
1.31
Strikeouts
40
38
K/9
75
10.16
Wins
7
0
Bottom of leagueAverage (50)Top of league

relief pitchers · by ERA

Top 64%

Mark Leiter Jr.'s ERA (4.28) ranks below average among 290 relievers with 20+ IP. The number on each bar is a percentile (higher is better); use the tabs to change the comparison pool.

PITCHING

Season · Career
CategoryGamesERAWinsLossesSavesInningsStrikeoutsWalksWHIP
2026 Season364.2801433.238111.31
Career3064.57163013386.04341421.33

Hover over a stat for its definition.

ARSENAL

Pitch arsenal · 2026 usage and average velocity
Splitter32.8%avg 136 km/h
Sinker26.1%avg 148 km/h
Curveball19.2%avg 119 km/h
Four-Seam11.6%avg 148 km/h
Cutter9.3%avg 144 km/h
Slider0.9%avg 133 km/h

ADVANCED

Advanced metrics · 2026 season

BABIP

.348

K/9

10.16

BB/9

2.94

HR/9

0.53

Quality starts

0

Whiff%

30.3%

GAME LOG

Last 10 games · includes team result
DateOppInningsHitsERWalksStrikeoutsTeam
07.18vs WSH1.01012W
07.12@ CWS1.00001L
07.09@ DET1.01002L
07.03vs MIA1.00002L
06.16vs PIT1.01000L
06.13vs COL1.01001W
06.08vs MIL0.11121L
06.07@ HOU1.00002W
06.04@ CHC1.00002L
06.03@ CHC0.20000W

SPLITS

Situational splits (2026)

Home

Opp AVG.182
IP16.0
K19
WHIP1.19

Away

Opp AVG.315
IP17.2
K19
WHIP1.42

vs LHP

Opp AVG.237
IP19.2
K28
WHIP1.37

vs RHP

Opp AVG.288
IP13.2
K10
WHIP1.24

RISP

Opp AVG.267
IP8.1
K10
WHIP1.68

YEAR BY YEAR

Year-by-year · Career trends

ERALower is better

▼ Trending up year over year
ERA by yearFrom 4.96 in 2017 to 4.28 in 2026. Lower is better for this stat.2017 ERA: 4.964.9620172018 ERA: 7.717.7120182022 ERA: 3.9920222023 ERA: 3.503.5020232024 ERA: 4.5020242025 ERA: 4.8420252026 ERA: 4.284.282026
Show yearly figures
ERA year-by-year details
YearERA
20174.96
20187.71
20223.99
20233.50
20244.50
20254.84
20264.28

WHIPLower is better

▼ Trending up year over year
WHIP by yearFrom 1.33 in 2017 to 1.31 in 2026. Lower is better for this stat.2017 WHIP: 1.331.3320172018 WHIP: 2.012.0120182022 WHIP: 1.1420222023 WHIP: 1.121.1220232024 WHIP: 1.3320242025 WHIP: 1.5320252026 WHIP: 1.311.312026
Show yearly figures
WHIP year-by-year details
YearWHIP
20171.33
20182.01
20221.14
20231.12
20241.33
20251.53
20261.31

Strikeouts

▼ Trending down year over year
Strikeouts by yearFrom 84 in 2017 to 38 in 2026.2017 Strikeouts: 848420172018 Strikeouts: 222220182022 Strikeouts: 7320222023 Strikeouts: 7720232024 Strikeouts: 868620242025 Strikeouts: 5420252026 Strikeouts: 38382026
Show yearly figures
Strikeouts year-by-year details
YearStrikeouts
201784
201822
202273
202377
202486
202554
202638
YearTeamGamesERAWinsLossesSavesInningsStrikeoutsWalksWHIP
2017PHI274.9636090.284311.33
2018PHI125.4001016.21381.80
2018TOR813.500006.2942.55
2018—207.7101023.122122.01
2022CHC353.9927367.273251.14
2023CHC693.5013464.177241.12
2024CHC394.2124036.153131.10
2024NYY214.9821021.23391.71
2024—604.5045058.086221.33
2025NYY594.8467248.154171.53
2026ATH364.2801433.238111.31