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Relief Pitcher · Kansas City Royals

Mason Black

RHP · Throws Right · Age 26Reliever

ERA

3.57

FIP

–

17.2

W-L

0-0

WHIP

1.70

18.3

BB%

13.4

GB%

–

K/9

7.6

HR/9

1.5

Drafted by the San Francisco Giants in 2021 (round 3), he was acquired by the Kansas City Royals via trade from the San Francisco Giants in November 2025. He made his MLB debut on May 6, 2024.Facts: MLB StatsAPI (people · transactions)

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

Sinker

SI · lead pitch

27% of pitches · .450 xwOBA allowed · 76 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 (27% usage) has allowed .450 xwOBA over 76 balls in play — his most-used pitch.

Arsenal

usage × whiff, ranked

7 pitch types · 1,070-pitch sample · 2026/2025/2024 blend, weighted 4/3/1

Sinker SI

27% usage · 14% whiff · .450 xwOBA · 94.2 mph

Four-Seam Fastball FF

26% usage · 17% whiff · .387 xwOBA · 94.2 mph

Sweeper ST

25% usage · 19% whiff · .341 xwOBA · 82.8 mph

Slider SL

11% usage · 14% whiff · .347 xwOBA · 86.3 mph

Cutter FC

6% usage · .573 xwOBA

Changeup CH

4% usage · .298 xwOBA

Curveball CU

1% usage · .005 xwOBA

Whiff% Trend

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

SinkerFour-Seam FastballSweeper

Hand Splits

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

Split	K%	xwOBA	Sample
vs. LHB	20.2	.387	121
vs. RHB	18.2	.390	148

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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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