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Relief Pitcher · Athletics

Mark Leiter Jr.

RHP · Throws Right · Age 35Reliever

ERA

4.28

FIP

–

33.2

W-L

0-1

WHIP

1.31

26.4

BB%

7.6

GB%

–

K/9

10.2

HR/9

0.5

Drafted by the Philadelphia Phillies in 2013 (round 22), he was signed by the Athletics in free agency in December 2025. He made his MLB debut on April 28, 2017.Facts: MLB StatsAPI (people · transactions)

No scheduled start today. The model projection and lineup matchup appear on start days.

Sinker

SI · lead pitch

32% of pitches · .369 xwOBA allowed · 196 BIP · where it goes, what it costs

Pitcher Locations

where he throws it · catcher’s view

Rare 0% · Common 10% · Very common 20%+

xwOBA Allowed

damage done by zone · all batters

Cold .200 · Avg .310 · Hot .500+

Expected Damage

locations × damage zones

Low risk · Average · High-risk zone

Sinker (32% usage) has allowed .369 xwOBA over 196 balls in play — his most-used pitch.

Arsenal

usage × whiff, ranked

7 pitch types · 2,455-pitch sample · 2026/2025/2024 blend, weighted 4/3/1

Sinker SI

32% usage · 8% whiff · .369 xwOBA · 92.2 mph

Splitter FS

32% usage · 45% whiff · .216 xwOBA · 84.3 mph

Curveball CU

22% usage · 42% whiff · .287 xwOBA · 73.9 mph

Cutter FC

6% usage · 20% whiff · .485 xwOBA · 89.7 mph

Four-Seam Fastball FF

5% usage · 12% whiff · .380 xwOBA · 92.3 mph

Sweeper ST

2% usage · 39% whiff · .321 xwOBA

Slider SL

1% usage · .426 xwOBA

Whiff% Trend

last 8 outings · by pitch · min 5 swings per point

SinkerSplitterCurveball

Hand Splits

K% + xwOBA allowed by batter side · 2026/2025/2024 blend, weighted 4/3/1

Split	K%	xwOBA	Sample
vs. LHB	32.5	.278	349
vs. RHB	19	.341	267

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Market lines

current pick’em lines by book · updates through the day

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DFS picks

today’s picks for this pitcher, probability-sorted · graded nightly

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