Players · J · Pitcher · 2026

Drey Jameson

Arizona Diamondbacks National League West

Age: 29
B/T: R/R
Height: 6' 0"
Weight: 175 lb
Number: #99

Born: August 17, 1997 in Greenfield, IN, United States
MLB debut: September 15, 2022
Drafted: 2019, round 1C
College: Ball State

dbWAR: .7
IP: 19.1
ERA: 5.12
FIP: 4.14
K/9: 6.1
FIP−: 99

Drey Jameson is a relief pitcher for the Arizona Diamondbacks. In 2026 he struck out 13 batters over 19.1 innings across 12 appearances, going 0-0. His ERA of 5.12 is 22.6% higher than the league average of 4.18. Stripping out defence, his 4.14 FIP suggests he pitched better than his ERA shows. He missed bats on 27.1% of swings (12.7% of every pitch he threw), walked 11.6% of the batters he faced and struck out 15.1%. His 0.1 dbWAR is built from that FIP rather than runs allowed, so it credits him for what he controls and not for the defence behind him.

League context

Percentile among qualified pitchers, 2026.

FIP4.14

K/96.1

WHIP1.50

WAR.1

WAR by season

Pitching

Standard and advanced, by season.


2026	AZ	12	0	19.1	0	0	0	19	11	13	10	5.12	4.14	1.50	6.1	4.7	123	99	0.1
2025	AZ	3	0	3.0	0	1	1	4	1	0	3	3.00	6.14	2.33	0.0	9.0	72	148	-0.1
2023	AZ	15	3	40.2	3	1	1	40	15	37	18	3.32	4.76	1.43	8.2	4.0	77	110	0.1
2022	AZ	4	4	24.1	3	0	0	20	4	24	7	1.48	3.19	1.11	8.9	2.6	37	81	0.5

Platoon splits

How left- and right-handed hitters fare against him.

Season

Opponent batting by the side the hitter bats from, 2026. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
Split	PA	AB	H	HR	BB	SO	AVG	OBP	SLG	wOBA	K%
vs LHB	47	38	11	0	9	7	.289	.426	.421	.387	14.9%
vs RHB	39	36	8	1	1	6	.222	.256	.333	.259	15.4%

Pitch sequencing

What Drey Jameson throws in each count, and what he follows each pitch with. Select any cell for the breakdown.

ShowBatter

SliderChangeupFour-seamSinkerSweeper

Select a count to see exactly what Drey Jameson throws in it.

Pitch arsenal

What he throws, how hard, how often it misses, and what hitters do with it.

Season


Slider	34.0%	104	87.1	2,542	51.9%	41.2%	30	.300	.810
Changeup	20.9%	64	89.6	1,935	35.9%	30.3%	16	.313	.728
Four-Seam Fastball	20.3%	62	96.8	2,356	41.9%	16.0%	9	—	—
Sinker	17.6%	54	95.7	2,252	46.3%	7.7%	13	—	—
Sweeper	7.2%	22	83.0	2,685	31.8%	22.2%	6	—	—

Drey Jameson's arsenal by usage. Velocity is average release speed in mph, spin in rpm, and whiff rate is misses per swing — the cleanest single measure of whether a pitch beats hitters. BAA and OPS are what hitters did against each pitch, credited to the one that ended the plate appearance, and are left blank under 15 at-bats.

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Drey Jameson

How these are computed

wOBA uses linear weights measured from this season's own play-by-play rather than published constants, and wRC+ is park-adjusted against that same league. dbWAR is our own open implementation — not fWAR or bWAR — and the full derivation, including its simplifications, is on the methodology page.