Kai-Wei Teng

Active

Sugar Land Space Cowboys · Pitcher

Age 276' 4" · 241 lbsThrows Right

FBaseball Overview

Coming off a disappointing 2025 campaign marked by a 6.37 ERA and 1.55 WHIP in limited action, Teng shows modest improvement in 2026 with a 4.36 ERA and 1.36 WHIP across 64 innings, suggesting he's finding more consistency in his second full season. His strikeout rate remains respectable at 63 K in 2026, providing some fantasy appeal in that category, though his 4-6 record and lack of save opportunities indicate he remains a back-end starter without immediate win-column production. Fantasy managers should view Teng as a depth pitcher best deployed in deeper leagues or as a streaming option, banking primarily on strikeout upside while accepting that his control issues (reflected in his elevated WHIP) and inconsistent win support limit his ceiling. His trajectory suggests potential for growth as he gains MLB experience, but 2026 is likely still a developmental year rather than a breakout campaign.

MLB Pitching

Year	Team	G	GS	W	L	ERA	WHIP	K	IP	BB
2024	San Francisco Giants	4	0	0	0	9.82	2.09	7	11.0	8
2025	San Francisco Giants	8	7	2	4	6.37	1.55	39	29.2	17
2026	Houston Astros	30	10	5	7	4.76	1.38	73	73.2	33
Career	Totals	42	17	7	11	5.67	1.50	119	114.1	58

Source: MLB Stats API · Multi-team seasons show combined totals — click to expand

Minor League Pitching

Year	Team	G	GS	W	L	SV	ERA	WHIP	K	IP	BB
2018	GCL Twins	10	9	3	3	0	3.59	1.20	47	42.2	15
2019	2 teams▼	14	13	7	0	0	1.58	0.97	88	79.2	21
2021	Eugene Emeralds	21	21	5	6	0	4.33	1.35	142	95.2	53
2022	Richmond Flying Squirrels	28	28	6	12	0	5.22	1.52	169	136.1	85
2023	2 teams▼	29	28	7	8	0	4.42	1.36	164	126.1	68
2024	2 teams▼	25	14	3	6	0	8.66	1.81	65	79	46
2025	Sacramento River Cats	26	4	3	2	2	3.63	1.12	89	57.0	22
2026	2 teams▼	13	2	0	0	0	2.08	0.63	23	17.1	4
Career	Totals	166	119	34	37	2	4.56	1.35	787	634	314

Source: MLB Stats API · Multi-team seasons show combined totals — click to expand

Last Week / Last Month

Current season · MLB only

7 games

G	GS	IP	W-L	SV	ERA	WHIP	K	BB
7	0	9.2	1-1	0	7.45	1.55	10	5

30 games

G	GS	IP	W-L	SV	ERA	WHIP	K	BB
30	10	73.2	5-7	0	4.76	1.38	73	33

Game Log2026 MLB

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Advanced Stats2026 season · via Baseball Savant

Click for year to year changes

FB Velo93.3 mph

Avg Spin2488 rpm

Whiff %26.3%

K %22.2%

BB %10.0%

Hard Hit %39.0%

Barrel %8.1%

xERA4.96

xBA Against0.249

xSLG Against0.404

BA Against0.245

SLG Against0.415

GB%39.5%

FB%24.3%

What These Stats Mean

FB Velo — Average fastball velocity. Harder throwers generate more swings and misses, setting up every other pitch in their arsenal. Velocity is the foundation of strikeout upside.

Avg Spin — Average spin rate across all pitches. Higher spin creates more movement and makes pitches harder to square up — elite spinners run better strikeout and batting average against numbers.

Whiff % — Swings-and-misses per swing. The most direct measure of a pitcher's ability to miss bats and the best leading indicator of strikeout rate.

K % — Strikeout rate per batter faced. The core fantasy pitching stat — high K% means reliable strikeout totals that hold up even in shorter starts.

BB % — Walk rate per batter faced. The primary control metric. High BB% tanks ERA and WHIP and keeps baserunners on constantly. Elite starters typically run below 7%.

Hard Hit % — Percentage of batted balls hit 95 mph or harder against. Low hard-hit% means weak contact, protecting both ERA and the defense behind the pitcher.

Barrel % — Percentage of batted balls barreled against. The most direct home run predictor — low barrel% pitchers rarely give up long balls.

xERA — Expected ERA based on contact quality allowed, removing the effect of sequencing, luck, and defense. Better predictor of future ERA than ERA itself.

xBA Against — Expected batting average opponents should hit based on contact quality. A gap between xBA and actual BA indicates unsustainable luck in either direction.

xSLG Against — Expected slugging allowed based on contact quality. High xSLG against predicts future extra-base damage; low xSLG means the pitcher is genuinely suppressing power.

BA Against — Actual batting average opponents are hitting — a key WHIP component. Check xBA to see if the number is sustainable.

SLG Against — Actual slugging allowed. Captures hits, doubles, triples, and home runs — lower means the pitcher is limiting the power damage he gives up.

GB% — Ground ball rate. High GB% pitchers generate double plays, limit home runs, and keep the ball in the park — great for protecting ERA and WHIP ratios.

FB% — Fly ball rate. High FB% pitchers give up more air contact — dangerous when combined with high exit velocity, less so when contact is soft.

Loading player data...

Year

Team

ERA

WHIP

2024

San Francisco Giants

9.82

2.09

11.0

2025

San Francisco Giants

6.37

1.55

29.2

2026

Houston Astros

4.76

1.38

73.2

Career

Totals

5.67

1.50

119

114.1

Year

Team

ERA

WHIP

2018

GCL Twins

3.59

1.20

42.2

2019

2 teams▼

1.58

0.97

79.2

2021

Eugene Emeralds

4.33

1.35

142

95.2

2022

Richmond Flying Squirrels

5.22

1.52

169

136.1

2023

2 teams▼

4.42

1.36

164

126.1

2024

2 teams▼

8.66

1.81

2025

Sacramento River Cats

3.63

1.12

57.0

2026

2 teams▼

2.08

0.63

17.1

Career

Totals

166

119

4.56

1.35

787

634

314

W-L

ERA

WHIP

9.2

1-1

7.45

1.55

W-L

ERA

WHIP

73.2

5-7

4.76

1.38