CHC · P

Ryan Zeferjahn

Age 28 B/T R/R 6′5″, 209 lb USA MLB debut 2024

40-man

The Cubs’ roster as it stands late-inning relief · 56 IP · 0.1 WAR in the role
Trade read Available at a price: CHC 44% playoff odds; control through 2030.

Keystone Stuff 118 95th pct

2026 fWAR 0.5

Projected 2027 WAR 0.2 at 70 IP · 0.1 in his 2027 role

Pitching · 2026 percentiles

vs. MLB pitchers with 500+ pitches · 1,269 pitches

Keystone Stuff 118

Keystone Location 90

Keystone Pitching 110

Run value (xRV) +0.73

Strikeout % 30.9%

Walk % 13.2%

Whiff % 31.8%

Chase % 26.9%

Fastball velo 97.1

Extension 6.7 ft

69.2 IP3.88 ERA3.82 FIP 36° arm7 SV

Arsenal & Pitch Lab

Movement normalized to arm side · Keystone Stuff by pitch

RHP · arm angle 36° · how to read

Pitch	Use	Velo	IVB	HB	Stuff	Loc	Whiff	xRV/100
Sweeper40% use	40%	85.5	5.1	−14.8	125	107	38%	+1.84
Four-seam33% use	33%	97.5	15.9	+3.1	107	76	36%	−0.19
Sinker16% use	16%	96.4	8.6	+14.0	96	92	13%	+0.12
Slider10% use	10%	88.7	−0.2	−6.6	107	110	20%	+0.82
Curveball2% use	2%	84.3	−7.4	−10.4	104	53	45%	−1.68

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

Most similar pitchers

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

Similarity	Player	Stuff	’26 WAR	’27 proj	2027
43	Seranthony Domínguez SEA · ’94	111	0.0	0.2	Signed $10.5M
43	Yoendrys Gómez MIN · ’99	115	0.4	0.3	Pre-arb
43	Orion Kerkering PHI · ’01	107	0.3	0.7	Arb
43	Bryan Abreu HOU · ’97	109	−0.3	0.6	Free agent
43	Matt Festa CLE · ’93	111	0.6	0.4	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

Sweeper 39%

45% zone

Four-seam 30%

36% zone

Sinker 20%

49% zone

Slider 10%

49% 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 0.2 WAR Pre-arb $780K*

2028 0.1 WAR Arbitration $1.6M*

2029 0.0 WAR Arbitration $1.6M*

2030 −0.1 WAR Arbitration $1.6M*

* projected arbitration or minimum salary. Contract Studio →