Relief Pitcher · Athletics
Mason Barnett
ERA
3.54
FIP
–
IP
20.1
W-L
1-0
WHIP
1.23
K%
25.3
BB%
13.3
GB%
–
K/9
9.3
HR/9
2.2
Drafted by the Kansas City Royals in 2022 (round 3), he was acquired by the Athletics via trade from the Kansas City Royals in July 2024. He made his MLB debut on August 30, 2025.Facts: MLB StatsAPI (people · transactions)
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Four-Seam Fastball
FF · lead pitch47% of pitches · .372 xwOBA allowed · 94 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
Four-Seam Fastball (47% usage) has allowed .372 xwOBA over 94 balls in play — his most-used pitch.
Arsenal
usage × whiff, ranked6 pitch types · 769-pitch sample · 2026/2025 blend, weighted 4/3/1
Whiff% Trend
last 8 outings · by pitch · min 5 swings per point
Four-Seam FastballSweeperCurveball
Hand Splits
K% + xwOBA allowed by batter side · 2026/2025 blend, weighted 4/3/1
| Split | K% | xwOBA | Sample |
|---|---|---|---|
| vs. LHB | 15.1 | .329 | 74 |
| vs. RHB | 27 | .321 | 107 |
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Market lines
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DFS picks
today’s picks for this pitcher, probability-sorted · graded nightly
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