HOU · P

Kai-Wei Teng

Age 27 B/T R/R 6′4″, 241 lb Taiwan MLB debut 2024

40-man

Houston’s roster as it stands bullpen · 56 IP · 0.2 WAR in the role

Keystone Stuff 93 21st pct

2026 fWAR 0.2

Projected 2027 WAR 0.3 at 70 IP · 0.2 in his 2027 role

Pitching · 2026 percentiles

vs. MLB pitchers with 500+ pitches · 1,266 pitches

Keystone Stuff 93

Keystone Location 87

Keystone Pitching 88

Run value (xRV) −0.65

Strikeout % 22.2%

Walk % 10.0%

Whiff % 26.3%

Chase % 28.5%

Fastball velo 93.3

Extension 6.3 ft

73.2 IP4.76 ERA4.76 FIP 24° arm

Arsenal & Pitch Lab

Movement normalized to arm side · Keystone Stuff by pitch

RHP · arm angle 24° · how to read

Pitch	Use	Velo	IVB	HB	Stuff	Loc	Whiff	xRV/100
Sweeper35% use	35%	84.2	0.9	−15.0	103	96	31%	+0.11
Four-seam27% use	27%	93.3	13.3	+9.9	93	98	18%	−0.68
Sinker17% use	17%	93.2	5.8	+15.9	88	91	18%	−0.40
Changeup10% use	10%	87.0	4.4	+14.6	84	90	26%	−3.10
Curveball9% use	9%	82.4	−8.3	−16.4	94	65	40%	−1.26

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

Most similar pitchers

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

Similarity	Player	Stuff	’26 WAR	’27 proj	2027
52	Mitch Keller PIT · ’96	93	1.0	1.3	Signed $18.4M
52	Jack Perkins ATH · ’99	103	0.8	0.7	Pre-arb
50	Austin Warren NYM · ’96	98	0.1	0.1	Arb
48	Michael Soroka AZ · ’97	97	2.7	2.0	Free agent
48	Will Warren NYY · ’99	102	2.2	2.0	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 31%

51% zone

Sweeper 29%

46% zone

Changeup 17%

31% zone

Curveball 13%

29% zone

Sinker 9%

51% 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 0.3 WAR —

2028 0.3 WAR —

2029 0.2 WAR —

2030 0.1 WAR —

Contract Studio →

Minor leagues

MLB Stats API · public box-score data

SeasonLevel	Level	Team	Age	G	PA / IP	PA / IP ·Line
2026AAA	AAA	Sugar Land Space Cowboys	27	11	14.1 IP	14.1 IP · 2.51 ERA · 39.2% K · 5.9% BB
2026ROK	ROK	FCL Astros	27	2	3 IP	3 IP · 0.00 ERA · 27.3% K · 9.1% BB
2025AAA	AAA	Sacramento River Cats	26	26	57 IP	57 IP · 3.63 ERA · 37.1% K · 9.2% BB