AZ · P

Zac Gallen

Age 31 B/T R/R 6′2″, 189 lb USA MLB debut 2019

40-man

Free agent est. 1 yr × $2.9M ($2M–$7M) · +0.3 wins to Pittsburgh’s Winter Plan as call-up depth
Injured list 2026: Right elbow inflammation (Jul 12–Sep 9)

Keystone Stuff 90 14th pct

2026 fWAR −0.1

Projected 2027 WAR 0.6 Keystone Marcel+ at 142 IP

Pitching · 2026 percentiles

vs. MLB pitchers with 500+ pitches · 1,779 pitches

Keystone Stuff 90

Keystone Location 115

Keystone Pitching 100

Run value (xRV) −1.43

Strikeout % 13.6%

Walk % 7.4%

Whiff % 19.1%

Chase % 31.1%

Fastball velo 93.3

Extension 6.6 ft

105.1 IP6.07 ERA5.34 FIP 44° arm

Arsenal & Pitch Lab

Movement normalized to arm side · Keystone Stuff by pitch

RHP · arm angle 44° · how to read

Pitch	Use	Velo	IVB	HB	Stuff	Loc	Whiff	xRV/100
Four-seam35% use	35%	93.4	16.5	+3.2	94	111	6%	−2.19
Slider23% use	23%	88.9	4.6	−4.5	96	115	29%	−1.49
Knuckle curve19% use	19%	81.6	−9.9	−4.0	95	105	23%	−1.26
Changeup17% use	17%	86.6	4.3	+12.6	88	109	27%	+0.16
Sinker6% use	6%	92.7	13.3	+11.0	83	94	8%	−1.80

Pitch idea (fragile)

Built from his own fastball (93.4 mph) plus the typical shape 19 pitchers with his slot (44°) throw: a sweeper around 81.9 mph, 2.6″ rise, −17.8″ arm-side. On the same model it grades +12 against his knuckle curve, the pitch with the same job (+2 to +20 across the production and three cross-fit models), about 108 on his knuckle curve’s scale; the comps’ own sweepers grade 105 at the median, so that sits above 74% of them. The fits disagree, so it isn’t queued.

Most similar pitchers

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

Similarity	Player	Stuff	’26 WAR	’27 proj	2027
69	Simeon Woods Richardson SEA · ’00	87	−0.5	0.7	—
64	Hunter Dobbins STL · ’99	92	0.4	1.0	—
64	Casey Mize SD · ’97	90	2.3	2.1	Free agent
62	Janson Junk MIA · ’96	100	2.0	2.0	Pre-arb
61	Mike Burrows HOU · ’99	90	−0.4	0.5	Pre-arb

Casey Mize (similarity 64, 2.1 WAR projected for 2027) is a free agent this winter: a similar arsenal available without trading talent, at a free agent’s price. Opportunity Finder →

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 39%

51% zone

Changeup 27%

28% zone

Knuckle curve 22%

32% zone

Slider 12%

36% 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 0.6 WAR Free agent

2028 0.4 WAR Free agent

2029 0.1 WAR Free agent

2030 −0.2 WAR Free agent

A pending free agent: no club controls his 2027. Contract Studio →

Minor leagues

MLB Stats API · public box-score data

SeasonLevel	Level	Team	Age	G	PA / IP	PA / IP ·Line
2026AAA	AAA	Reno Aces	30	1	1.2 IP	1.2 IP · 0.00 ERA · 25.0% K · 25.0% BB