STL · P

Gordon Graceffo

Age 26 B/T R/R 6′4″, 220 lb USA MLB debut 2024

40-man

St. Louis’ roster as it stands bullpen · 63 IP · 0.5 WAR in the role
Trade read Available at a price: STL 27% playoff odds; control through 2031.

Keystone Stuff 91 15th pct

2026 fWAR 0.6

Projected 2027 WAR 0.6 at 75 IP · 0.5 in his 2027 role

Pitching · 2026 percentiles

vs. MLB pitchers with 500+ pitches · 1,222 pitches

Keystone Stuff 91

Keystone Location 86

Keystone Pitching 87

Run value (xRV) −0.41

Strikeout % 19.3%

Walk % 11.0%

Whiff % 21.2%

Chase % 28.9%

Fastball velo 95.3

Extension 6.3 ft

81.0 IP2.67 ERA3.79 FIP 50° arm1 SV

Arsenal & Pitch Lab

Movement normalized to arm side · Keystone Stuff by pitch

RHP · arm angle 50° · how to read

Pitch	Use	Velo	IVB	HB	Stuff	Loc	Whiff	xRV/100
Four-seam38% use	38%	95.3	15.5	+7.0	83	102	13%	−0.86
Slider18% use	18%	86.7	−2.7	−1.0	105	97	36%	+0.28
Cutter15% use	15%	89.4	2.9	−0.8	96	71	27%	−0.47
Changeup14% use	14%	88.2	4.2	+13.5	101	92	23%	+1.27
Curveball8% use	8%	83.2	−16.0	−2.2	99	81	15%	−3.29
Sinker7% use	7%	94.8	12.1	+13.1	95	71	18%	+0.57

Weak pitch to watch

Cutter grades 96 with below-average expected results; his slider grades 105. The best case is against righties: the slider is worth +0.4 runs per 100 pitches more, 0.5 standard errors (120 and 125 pitches), short of the 2 needed. No mix change until it clears.

Weak pitch to watch

Four-seam grades 83 with below-average expected results; his slider grades 105. The best case is against lefties: the slider is worth +0.9 runs per 100 pitches more, 1.2 standard errors (104 and 247 pitches), short of the 2 needed. No mix change until it clears.

Most similar pitchers

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

Similarity	Player	Stuff	’26 WAR	’27 proj	2027
58	Travis Adams MIN · ’00	90	0.1	0.1	—
57	Lucas Erceg KC · ’95	98	−0.5	0.3	Arb
47	Kevin Ginkel AZ · ’94	95	0.8	0.5	Free agent
47	Dennis Santana AZ · ’96	89	−0.3	0.3	Free agent
46	Ryne Stanek STL · ’91	102	0.0	−0.1	Free agent

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 35%

49% zone

Cutter 20%

40% zone

Slider 19%

35% zone

Sinker 14%

29% zone

Curveball 8%

28% 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 Pre-arb $780K*

2028 0.6 WAR Pre-arb $803K*

2029 0.5 WAR Arbitration $1.9M*

2030 0.5 WAR Arbitration $2.9M*

* 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	Memphis Redbirds	26	1	1.1 IP	1.1 IP · 0.00 ERA · 20.0% K · 20.0% BB
2025AAA	AAA	Memphis Redbirds	25	24	45.1 IP	45.1 IP · 3.77 ERA · 23.7% K · 6.8% BB

ABS challenges · 2026

Baseball Savant

As pitcher 0% 0/1 won · 0.0 runs