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Relief Pitcher · Kansas City Royals

Mason Black

RHP · Throws Right · Age 26Reliever

ERA

3.77

FIP

–

28.2

W-L

0-0

WHIP

1.60

14.6

BB%

14.6

GB%

–

K/9

6.0

HR/9

1.6

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 · .433 xwOBA allowed · 87 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 .433 xwOBA over 87 balls in play — his most-used pitch.

Arsenal

usage × whiff, ranked

7 pitch types · 1,207-pitch sample · 2026/2025/2024 blend, weighted 4/3/1

Sinker SI

27% usage · 12% whiff · .433 xwOBA · 93.9 mph

Four-Seam Fastball FF

25% usage · 16% whiff · .362 xwOBA · 93.9 mph

Sweeper ST

24% usage · 18% whiff · .325 xwOBA · 82.8 mph

Slider SL

12% usage · 16% whiff · .335 xwOBA · 86.7 mph

Cutter FC

6% usage · 21% whiff · .603 xwOBA · 90.6 mph

Changeup CH

4% usage · .363 xwOBA

Curveball CU

3% usage · .158 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	19.1	.392	135
vs. RHB	15.3	.360	169

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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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