ATH · P

Jack Perkins

Age 26 B/T R/R 6′1″, 220 lb USA MLB debut 2025

40-man

The Athletics’ roster as it stands #5 starter · 102 IP · 0.7 WAR in the role
Trade read Available at a price: ATH 27% playoff odds; control through 2031.

Keystone Stuff 103 62nd pct

2026 fWAR 0.8

Projected 2027 WAR 0.7 at 94 IP · 0.7 in his 2027 role

Pitching · 2026 percentiles

vs. MLB pitchers with 500+ pitches · 2,065 pitches

Keystone Stuff 103

Keystone Location 101

Keystone Pitching 104

Run value (xRV) −0.01

Strikeout % 25.9%

Walk % 9.4%

Whiff % 27.4%

Chase % 34.4%

Fastball velo 95.6

Extension 6.3 ft

121.0 IP6.10 ERA4.77 FIP 33° arm3 SV

Arsenal & Pitch Lab

Movement normalized to arm side · Keystone Stuff by pitch

RHP · arm angle 33° · how to read

Pitch	Use	Velo	IVB	HB	Stuff	Loc	Whiff	xRV/100
Four-seam29% use	29%	95.7	14.6	+9.9	100	99	17%	−1.01
Sweeper28% use	28%	86.3	1.7	−11.9	114	105	38%	+0.50
Changeup19% use	19%	89.5	0.4	+12.8	101	100	38%	+1.36
Cutter15% use	15%	92.6	7.7	+0.6	88	99	19%	−0.47
Sinker6% use	6%	94.8	8.9	+16.0	94	97	18%	−1.17

Weak pitch to watch

Cutter grades 88 with below-average expected results; his sweeper grades 114. The best case is against righties: the sweeper is worth +0.8 runs per 100 pitches more, 1.0 standard errors (293 and 138 pitches), short of the 2 needed. No mix change until it clears.

Most similar pitchers

Pitches like Perkins: same hand, shape, slot and mix

Similarity	Player	Stuff	’26 WAR	’27 proj	2027
58	Will Warren NYY · ’99	102	2.2	2.0	Pre-arb
56	George Kirby SEA · ’98	101	2.5	2.6	Arb
56	Troy Melton DET · ’00	101	1.6	1.5	Pre-arb
55	Griffin Jax TB · ’94	108	1.6	1.4	Arb
52	AJ Blubaugh HOU · ’00	104	0.2	0.3	Pre-arb

Same-handed pitchers nearest on fastball velocity and shape, arm angle, extension, pitch mix, secondary shapes, Stuff, whiff rate and workload. 2026 regulars only.

Pitch locations · 2026

Where each pitch finishes, by batter side

Four-seam 28%

47% zone

Changeup 27%

28% zone

Sweeper 25%

48% zone

Cutter 15%

45% zone

Where each pitch finishes, catcher’s view. The bar marks the batter’s side; the box is an average strike zone. Pitches with 40+ thrown to this side.

Contract & projection

Club control (RosterResource) · Keystone projected WAR

2027 0.7 WAR Pre-arb $780K*

2028 0.7 WAR Pre-arb $803K*

2029 0.7 WAR Arbitration $2.1M*

2030 0.6 WAR Arbitration $3.3M*

* projected arbitration or minimum salary. Contract Studio →

Minor leagues

MLB Stats API · public box-score data

SeasonLevel	Level	Team	Age	G	PA / IP	PA / IP ·Line
2026AAA	AAA	Las Vegas Aviators	26	3	7.2 IP	7.2 IP · 4.70 ERA · 29.0% K · 22.6% BB
2025AAA	AAA	Las Vegas Aviators	25	9	44 IP	44 IP · 2.86 ERA · 38.4% K · 11.3% BB

ABS challenges · 2026

Baseball Savant

As pitcher 100% 1/1 won · +0.4 runs