Players · T · Pitcher · 2026

Kai-Wei Teng

Age: 28
B/T: R/R
Height: 6' 4"
Weight: 241 lb
Number: #17

Born: December 1, 1998 in Taichung, Taiwan
MLB debut: March 31, 2024

dbWAR: .2
IP: 73.2
ERA: 4.76
FIP: 4.76
K/9: 8.9
FIP−: 114

Kai-Wei Teng is a relief pitcher for the Houston Astros. In 2026 he struck out 73 batters over 73.2 innings across 30 appearances, going 5-7. His ERA of 4.76 is 14.0% higher than the league average of 4.18 — 9th of 20 on his team, and 374th of 538 among MLB pitchers with 20+ innings. Stripping out defence, his 4.76 FIP suggests the ERA was no fluke. He missed bats on 26.3% of swings (11.5% of every pitch he threw), walked 10.0% of the batters he faced and struck out 22.2%. His 0.1 dbWAR is built from that FIP rather than runs allowed, so it credits him for what he controls and not for the defence behind him.

League context

Percentile among qualified pitchers, 2026.

FIP4.76

K/98.9

WHIP1.38

WAR.1

WAR by season

Pitching

Standard and advanced, by season.


2026	HOU	30	10	73.2	5	7	69	39	73	33	4.76	4.76	1.38	8.9	4.0	114	114	0.1
2025	SF	8	7	29.2	2	4	29	21	39	17	6.37	3.81	1.55	11.8	5.2	153	92	0.5
2024	SF	4	0	11.0	0	0	15	12	7	8	9.82	6.71	2.09	5.7	6.5	241	165	-0.3

Platoon splits

How left- and right-handed hitters fare against him.

Season

Opponent batting by the side the hitter bats from, 2026. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
Split	PA	AB	H	HR	BB	SO	AVG	OBP	SLG	wOBA	K%
vs LHB	186	156	41	8	20	38	.263	.378	.487	.383	20.4%
vs RHB	144	127	28	2	13	35	.220	.313	.323	.293	24.3%

Pitch sequencing

What Kai-Wei Teng throws in each count, and what he follows each pitch with. Select any cell for the breakdown.

ShowBatter

SweeperFour-seamSinkerChangeupCurveballSlider

Select a count to see exactly what Kai-Wei Teng throws in it.

Pitch arsenal

What he throws, how hard, how often it misses, and what hitters do with it.

Season


Sweeper	35.4%	448	84.2	2,731	49.8%	31.0%	115	.191	.654
Four-Seam Fastball	27.3%	345	93.3	2,471	44.6%	18.4%	77	.299	.879
Sinker	16.5%	209	93.2	2,408	49.3%	17.9%	38	.263	.838
Changeup	10.0%	127	87.0	1,654	34.6%	25.9%	29	.310	.816
Curveball	9.2%	116	82.4	2,622	41.4%	40.0%	24	.208	.678
Slider	1.7%	21	85.5	2,677	47.6%	66.7%	2	—	—

Kai-Wei Teng's arsenal by usage. Velocity is average release speed in mph, spin in rpm, and whiff rate is misses per swing — the cleanest single measure of whether a pitch beats hitters. BAA and OPS are what hitters did against each pitch, credited to the one that ended the plate appearance, and are left blank under 15 at-bats.

Head to head

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Similar players

Nearest 2026 seasons by command, run prevention and role, on rate statistics rather than totals.

Reynaldo LópezATL

ERA: 4.54
FIP: 4.39
SO: 73
WAR: 0.6

Very close

Chris MurphyCWS

ERA: 4.81
FIP: 4.35
SO: 35
WAR: 0.1

Very close

Cionel PérezNYM

ERA: 4.87
FIP: 4.48
SO: 42
WAR: 0.1

Very close

Griffin CanningSD

ERA: 5.57
FIP: 4.82
SO: 85
WAR: 0.0

Very close

How these are computed

wOBA uses linear weights measured from this season's own play-by-play rather than published constants, and wRC+ is park-adjusted against that same league. dbWAR is our own open implementation — not fWAR or bWAR — and the full derivation, including its simplifications, is on the methodology page.