CHC · P

David Peterson

Age 31 B/T L/L 6′6″, 240 lb USA MLB debut 2020

40-man

Free agent est. 2 yr × $12.7M ($5M–$25M) · +1.0 wins to Pittsburgh’s Winter Plan as rotation depth

Keystone Stuff 90 11th pct

2026 fWAR 1.7

Projected 2027 WAR 1.9 Keystone Marcel+ at 161 IP

Pitching · 2026 percentiles

vs. MLB pitchers with 500+ pitches · 2,476 pitches

Keystone Stuff 90

Keystone Location 94

Keystone Pitching 90

Run value (xRV) −0.48

Strikeout % 20.7%

Walk % 9.8%

Whiff % 22.7%

Chase % 28.8%

Fastball velo 92.3

Extension 7.1 ft

148.1 IP4.79 ERA3.96 FIP 40° arm1 SV

Arsenal & Pitch Lab

Movement normalized to arm side · Keystone Stuff by pitch

LHP · arm angle 40° · how to read

Pitch	Use	Velo	IVB	HB	Stuff	Loc	Whiff	xRV/100
Sinker29% use	29%	92.1	8.2	+13.7	94	89	15%	−2.19
Four-seam25% use	25%	92.5	12.1	+2.5	85	94	20%	+0.05
Slider22% use	22%	86.4	2.7	−2.6	100	108	31%	+1.20
Changeup13% use	13%	85.7	3.6	+13.5	91	101	23%	−0.36
Curveball10% use	10%	80.5	−7.9	−5.5	97	90	31%	−0.57

No mix change or new pitch clears its bar. The arsenal is efficient for its shapes.

Most similar pitchers

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

Similarity	Player	Stuff	’26 WAR	’27 proj	2027
47	Kyle Freeland COL · ’93	93	0.8	0.9	Vesting option $17.0M
41	Daniel Lynch IV KC · ’96	98	0.5	0.2	Arb
40	Tim Mayza PHI · ’92	94	0.8	0.3	Signed $2.8M
40	Shane Drohan MIL · ’99	97	2.0	1.7	Pre-arb
40	Quinn Mathews STL · ’00	94	0.8	1.1	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 29%

35% zone

Sinker 26%

49% zone

Changeup 18%

35% zone

Slider 16%

45% zone

Curveball 12%

38% 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 1.9 WAR Free agent

2028 1.7 WAR Free agent

2029 1.3 WAR Free agent

2030 0.9 WAR Free agent

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

ABS challenges · 2026

Baseball Savant

As pitcher 100% 1/1 won · +0.1 runs