ATH · P

Gage Jump

Age 23 B/T L/L 6′0″, 200 lb USA MLB debut 2026

40-man FV 50 · #2 in org

The Athletics’ roster as it stands #1 starter · 115 IP · 1.7 WAR in the role
Injured list 2026: Left shoulder impingement (Sep 15–Sep 28)
Trade read Unlikely to be traded: Young and cheap for years (age 24, about $79M of surplus value through 2032): a core piece.

Keystone Stuff 106 75th pct

2026 fWAR 1.7

Projected 2027 WAR 1.8 at 119 IP · 1.7 in his 2027 role

Pitching · 2026 percentiles

vs. MLB pitchers with 500+ pitches · 1,756 pitches

Keystone Stuff 106

Keystone Location 101

Keystone Pitching 107

Run value (xRV) −0.35

Strikeout % 24.7%

Walk % 10.5%

Whiff % 25.2%

Chase % 30.4%

Fastball velo 96.1

Extension 6.4 ft

98.2 IP5.47 ERA4.01 FIP 43° arm

Arsenal & Pitch Lab

Movement normalized to arm side · Keystone Stuff by pitch

LHP · arm angle 43° · how to read

Pitch	Use	Velo	IVB	HB	Stuff	Loc	Whiff	xRV/100
Four-seam46% use	46%	96.3	16.5	+8.2	105	107	23%	−0.06
Slider23% use	23%	87.2	1.8	−5.1	108	107	27%	−0.18
Curveball11% use	11%	82.3	−11.8	−7.8	100	91	26%	−0.28
Changeup9% use	9%	87.6	7.3	+12.3	93	79	28%	−1.19
Sweeper6% use	6%	83.8	3.0	−13.9	118	90	36%	+0.41
Sinker5% use	5%	95.0	13.1	+13.3	91	80	19%	−3.15

Weak pitch to watch

Changeup grades 93 with below-average expected results; his sweeper grades 118. Neither side has 60+ of each pitch. No mix change until it clears.

Most similar pitchers

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

Similarity	Player	Stuff	’26 WAR	’27 proj	2027
65	Yusei Kikuchi LAA · ’91	101	1.1	1.0	Signed $21.0M
64	Carlos Rodón NYY · ’92	109	1.8	1.5	Signed $27.8M
62	Reid Detmers LAA · ’99	104	4.9	2.6	Arb
62	Connor Prielipp MIN · ’01	100	2.0	1.8	Pre-arb
58	Matthew Liberatore STL · ’99	96	1.1	1.4	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 48%

53% zone

Slider 23%

45% zone

Curveball 13%

31% zone

Changeup 13%

21% zone

Sinker 3%

37% 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 1.8 WAR Pre-arb $780K*

2028 2.0 WAR Pre-arb $803K*

2029 2.1 WAR Pre-arb $828K*

2030 2.2 WAR Arbitration $3.9M*

* 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	23	9	38 IP	38 IP · 4.50 ERA · 33.1% K · 11.8% BB
2025A+	A+	Lansing Lugnuts	22	6	31 IP	31 IP · 2.32 ERA · 37.2% K · 4.1% BB
2025AA	AA	Midland RockHounds	22	20	81.2 IP	81.2 IP · 3.64 ERA · 25.3% K · 8.5% BB

FanGraphs: FV 50 · ETA 2026 · #73 overall. Public pitch tracking exists only at Triple-A and some Florida State League parks.