Major League Baseball PLAYER PROFILE

Mason Barnett

Athletics · Pitcher · Age 25 · #63

AGE25

BATSRight

THROWSRight

CURRENT LEVELMajor League Baseball

Mason Barnett is a pitcher for Athletics. Age 25. Bats right. Throws right. MLB debut: 2025-08-30.

2026 season by level

MLB

2026 · Major League Baseball

Athletics

Season 2026 · Major League Baseball

ERA7.16

WHIP1.75

W-L1-4

G19

GS5

IP44.0

SO42

BB28

K/98.59

BB/95.73

HR/92.45

AAA

2026 · Triple-A

Las Vegas Aviators

Season 2026 · Triple-A

ERA5.16

WHIP1.57

W-L4-3

G14

GS14

IP66.1

SO50

BB36

K/96.78

BB/94.88

HR/91.09

ALL PROFESSIONAL LEVELS

2026 combined total

ERA5.95

WHIP1.64

W-L5-7

G33

GS19

IP110.1

SO92

BB64

K/97.50

BB/95.22

HR/91.63

Combined totals add MLB and affiliated Minor League counting statistics. Rate statistics are recalculated, but they are not adjusted for differences in competition level.

Professional year-by-year

Minor League and MLB lines are labeled by both season and competition level.

MLB

2026 · Major League Baseball

Athletics

Season 2026 · Major League Baseball

ERA7.16

WHIP1.75

W-L1-4

G19

GS5

IP44.0

SO42

BB28

K/98.59

BB/95.73

HR/92.45

AAA

2026 · Triple-A

Las Vegas Aviators

Season 2026 · Triple-A

ERA5.16

WHIP1.57

W-L4-3

G14

GS14

IP66.1

SO50

BB36

K/96.78

BB/94.88

HR/91.09

MLB

2025 · Major League Baseball

Athletics

Season 2025 · Major League Baseball

ERA6.85

WHIP1.66

W-L1-1

GS5

IP22.1

SO18

BB11

K/97.25

BB/94.43

HR/91.21

AAA

2025 · Triple-A

Las Vegas Aviators

Season 2025 · Triple-A

ERA6.13

WHIP1.60

W-L6-2

G25

GS23

IP119.0

SO124

BB65

K/99.38

BB/94.92

HR/91.29

2024 · Double-A

Northwest Arkansas Naturals

Season 2024 · Double-A

ERA4.91

WHIP1.36

W-L5-6

G19

GS18

IP91.2

SO109

BB36

K/910.70

BB/93.53

HR/90.88

2024 · Double-A

Midland RockHounds

Season 2024 · Double-A

ERA2.61

WHIP1.09

W-L4-2

GS7

IP41.1

SO52

BB13

K/911.32

BB/92.83

HR/90.87

2024 · Double-A

Season 2024 · Double-A

ERA4.20

WHIP1.28

W-L9-8

G26

GS25

IP133.0

SO161

BB49

K/910.89

BB/93.32

HR/90.88

2023 · Double-A

Northwest Arkansas Naturals

Season 2023 · Double-A

ERA3.58

WHIP1.19

W-L2-1

GS7

IP32.2

SO43

BB12

K/911.85

BB/93.31

HR/90.55

High-A

2023 · High-A

Quad Cities River Bandits

Season 2023 · High-A

ERA3.18

WHIP1.18

W-L4-6

G16

GS16

IP82.0

SO94

BB38

K/910.32

BB/94.17

HR/90.33

Low-A

2022 · Low-A

Columbia Fireflies

Season 2022 · Low-A

ERA0.00

WHIP0.14

W-L1-0

GS0

IP7.0

SO11

BB1

K/914.14

BB/91.29

HR/90.00

Professional career totals

ERA4.89

WHIP1.41

W-L28-25

G115

GS95

IP506.1

SO543

BB240

SV2

Career by level

MLB

Major League Baseball

Athletics

ERA7.06

WHIP1.72

W-L2-5

G24

GS10

IP66.1

SO60

BB39

SV2

AAA

Triple-A

Las Vegas Aviators

ERA5.78

WHIP1.59

W-L10-5

G39

GS37

IP185.1

SO174

BB101

SV0

Double-A

ERA4.07

WHIP1.26

W-L11-9

G33

GS32

IP165.2

SO204

BB61

SV0

High-A

Quad Cities River Bandits

ERA3.18

WHIP1.18

W-L4-6

G16

GS16

IP82.0

SO94

BB38

SV0

Low-A

Columbia Fireflies

ERA0.00

WHIP0.14

W-L1-0

GS0

IP7.0

SO11

BB1

SV0

Advanced profile

BABIP.306

HR/92.45

P/IP18.68

Fielding

FLD%1.000

G19

GS5

INN44.0

PO4

DP0

Bio

Age25

Height6' 0"

Weight218

BatsRight

ThrowsRight

BornKennesaw, USA

Draft2022

MLB debut2025-08-30

StatusActive

Last 8 games

Date	Season · Level	Opponent	Performance
2026-09-18	2026 · MLB	at Cleveland Guardians	3.1 IP · 4 SO · 3 ER · 79 pitches
2026-09-12	2026 · AAA	vs Sacramento River Cats	9.0 IP · 6 SO · 2 ER · 102 pitches
2026-09-05	2026 · AAA	at El Paso Chihuahuas	3.0 IP · 1 SO · 6 ER · 74 pitches
2026-08-29	2026 · AAA	vs Sugar Land Space Cowboys	5.0 IP · 1 SO · 3 ER · 98 pitches
2026-08-23	2026 · AAA	at Albuquerque Isotopes	3.2 IP · 0 SO · 5 ER · 83 pitches
2026-08-17	2026 · MLB	at Kansas City Royals	2.2 IP · 2 SO · 6 ER · 83 pitches
2026-08-11	2026 · MLB	vs Tampa Bay Rays	4.0 IP · 0 SO · 5 ER · 67 pitches
2026-08-06	2026 · MLB	at Cincinnati Reds	4.1 IP · 7 SO · 5 ER · 82 pitches

Recent roster and availability activity

Cosmetic jersey/uniform-number changes are intentionally omitted.

2026-09-18 · Recalled

Athletics recalled RHP Mason Barnett from Las Vegas Aviators.

2026-08-18 · Optioned

Athletics optioned RHP Mason Barnett to Las Vegas Aviators.

2026-07-22 · Recalled

Athletics recalled RHP Mason Barnett from Las Vegas Aviators.

2026-07-15 · Optioned

Athletics optioned RHP Mason Barnett to Las Vegas Aviators.

2026-06-02 · Recalled

Athletics recalled RHP Mason Barnett from Las Vegas Aviators.

2026-05-15 · Optioned

Athletics optioned RHP Mason Barnett to Las Vegas Aviators.

2026-05-13 · Recalled

Athletics recalled RHP Mason Barnett from Las Vegas Aviators.

2026-04-20 · Optioned

Athletics optioned RHP Mason Barnett to Las Vegas Aviators.

Professional statistics are requested separately for MLB, Triple-A, Double-A, High-A and Low-A through MLB Stats API, then labeled and combined by Atlas Harbor. Prospect rankings and scouting grades are displayed only when the official MLB Pipeline page can be verified.