CLE · P

Foster Griffin

Age 31 B/T R/L 6′3″, 225 lb USA MLB debut 2020

40-man

Free agent est. 2 yr × $13.2M ($5M–$26M) · +0.9 wins to Pittsburgh’s Winter Plan as rotation depth

Keystone Stuff 100 50th pct

2026 fWAR 2.6

Projected 2027 WAR 1.8 Keystone Marcel+ at 156 IP

Pitching · 2026 percentiles

vs. MLB pitchers with 500+ pitches · 2,833 pitches

Keystone Stuff 100

Keystone Location 101

Keystone Pitching 96

Run value (xRV) −0.04

Strikeout % 21.9%

Walk % 6.2%

Whiff % 23.2%

Chase % 32.0%

Fastball velo 91.5

Extension 6.2 ft

172.2 IP3.60 ERA3.96 FIP 45° arm

Arsenal & Pitch Lab

Movement normalized to arm side · Keystone Stuff by pitch

LHP · arm angle 45° · how to read

Pitch	Use	Velo	IVB	HB	Stuff	Loc	Whiff	xRV/100
Cutter33% use	33%	88.5	7.5	−4.5	106	110	20%	+0.41
Four-seam16% use	16%	91.5	15.9	+4.5	94	100	19%	0.00
Sweeper15% use	15%	80.3	−0.9	−16.8	108	105	32%	−0.96
Changeup12% use	12%	82.5	7.3	+14.1	91	90	32%	+0.35
Sinker10% use	10%	91.4	10.2	+14.6	93	83	16%	+0.60
Curveball9% use	9%	77.8	−13.6	−8.6	94	95	24%	−1.53
Splitter6% use	6%	81.3	0.6	+0.7	100	91	26%	+0.15

Weak pitch to watch

Curveball grades 94 with below-average expected results; his sweeper grades 108. The best case is against righties: the sweeper is worth +0.2 runs per 100 pitches more, 0.2 standard errors (210 and 206 pitches), short of the 2 needed. No mix change until it clears.

Most similar pitchers

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

Similarity	Player	Stuff	’26 WAR	’27 proj	2027
65	Brandon Williamson CIN · ’98	94	−0.1	0.0	Arb
61	Zac Thornton NYM · ’02	101	0.7	1.0	Pre-arb
37	Tyler Holton DET · ’96	96	0.3	0.3	Arb
35	Andrew Abbott CIN · ’99	100	1.4	2.0	Arb
30	Jose Quintana COL · ’89	84	−0.1	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

Cutter 35%

54% zone

Four-seam 16%

50% zone

Changeup 16%

27% zone

Sweeper 10%

46% zone

Curveball 10%

35% zone

Sinker 7%

44% zone

Splitter 6%

18% 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 Free agent

2028 1.5 WAR Free agent

2029 1.2 WAR Free agent

2030 0.8 WAR Free agent

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