Kai-Wei Teng

Kai-Wei Teng

27-Year-Old PitcherRP
Houston Astros
2026 Fantasy Outlook
After struggling in four relief appearances the previous season, the Giants non-tendered Teng before re-signing him to a minor league deal without a 40-man roster spot. He earned another opportunity by August 1 after posting a 3.67 ERA, 1.11 WHIP and 86 strikeouts over 54 innings for Triple-A Sacramento. Teng made eight appearances for San Francisco, including seven starts, but the results did not carry over. He struck out 39 batters in 29.2 innings, yet 17 walks inflated his ratios. Control has long been an issue for Teng, and that problem resurfaced at the major league level. He works with average velocity, sitting around 93 mph with his four-seam fastball and sinker, and complements them with a curveball, slider and changeup. The slider and changeup are his best offerings, and improved control could still allow Teng to settle into a relief role. Read Past Outlooks
RANKS
Rest of Season
From Preseason
#366
ADP
Signed a one-year contract with the Astros in March of 2026.
Scoreless outing vs. A's
PHouston Astros
April 5, 2026
Teng threw 2.1 scoreless innings in Saturday's 11-0 win over the A's, allowing two hits while striking out three.
Analysis
Teng has gotten off to a nice start this season, allowing just one run on four hits and one walk over 5.2 innings in his first three appearances. Teng, who posted a 6.37 ERA across 29.2 innings in a swingman role with the Giants last season, earned a spot in Houston's Opening Day bullpen as Bennett Sousa (oblique), Enyel De Los Santos (knee), Nate Pearson (elbow) and Josh Hader (biceps) all opened the year on the IL.
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Pitching Stats
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2026 MLB Game Log
2026
2025
2024
2026 MLB Game Log
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2025 MLB Game Log
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2024 MLB Game Log
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Pitching Appearances Breakdown
Average Pitch Count
23
Last 10 Games
23
Last 5 Games
19
How many pitches does Kai-Wei Teng generally throw?
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
What part of the game does Kai-Wei Teng generally pitch?
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2024
 
 
-1%
BAA vs RHP
2026
 
 
-65%
BAA vs RHP
2025
 
 
-6%
BAA vs RHP
2024
 
 
-44%
BAA vs LHP
BAA Batters K BB H 2B 3B HR
Since 2024vs Left .250 109 24 7 24 3 0 3
Since 2024vs Right .248 130 33 22 26 4 0 3
2026vs Left .235 17 5 0 4 0 0 2
2026vs Right .083 28 6 4 2 0 0 0
2025vs Left .262 72 16 5 16 2 0 1
2025vs Right .245 67 23 12 13 3 0 1
2024vs Left .222 20 3 2 4 1 0 0
2024vs Right .393 35 4 6 11 1 0 2
More Splits View More Split Stats
Home/Away Pitching Splits
Since 2024
 
 
-29%
ERA on Road
2026
 
 
-33%
ERA on Road
2025
 
 
-28%
ERA on Road
2024
 
 
-54%
ERA on Road
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2024Home 7.64 1.70 17.2 2 1 0 5.6 6.6 0.5
Since 2024Away 5.45 1.41 34.2 1 3 0 11.9 4.2 1.3
2026Home 2.70 0.90 6.2 1 0 0 6.8 4.1 1.4
2026Away 1.80 0.80 5.0 0 0 0 10.8 1.8 1.8
2025Home 8.10 1.80 6.2 1 1 0 5.4 6.8 0.0
2025Away 5.87 1.48 23.0 1 3 0 13.7 4.7 0.8
2024Home 14.54 2.77 4.1 0 0 0 4.2 10.4 0.0
2024Away 6.75 1.65 6.2 0 0 0 6.8 4.1 2.7
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Stat Review
How does Kai-Wei Teng compare to other relievers?
This section compares his stats with all relief pitcher seasons from the previous three seasons (minimum 30 innings)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.

* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
  • K/BB
    Strikeout to walk ratio.
  • K/9
    Average strikeouts per nine innings.
  • BB/9
    Average walks per nine innings.
  • HR/9
    Average home runs allowed per nine innings.
  • Fastball
    Average fastball velocity.
  • ERA
    Earned run average. The average earned runs allowed per nine innings.
  • WHIP
    Walks plus hits per inning pitched.
  • BABIP
    Batting average on balls in play. Measures how many balls in play against a pitcher go for hits.
  • GB/FB
    Groundball to flyball ratio. The higher the number, the more likely a pitcher is to induce groundballs.
  • Left On Base
    The percentage of base runners that a pitcher strands on base over the course of a season.
  • Exit Velocity
    The speed of the baseball as it comes off the bat, immediately after a batter makes contact.
  • Barrels/BBE
    The percentage of batted ball events resulting in a Barrel. A Barrel is a batted ball with similar exit velocity and launch angle to past ones that led to a minimum .500 batting average and 1.500 slugging percentage.
  • Spin Rate
    Spin Rate is the rate of spin on a baseball after it is released. It is measured in revolutions per minute (rpm).
  • Balls Hit 95+ MPH
    The percentage of batted balls hit that met or exceeded the 95 MPH threshold.
  • Swinging Strike
    The percentage of pitches that result in a swing and a miss.
K/BB
2.75
 
K/9
10.2
 
BB/9
3.7
 
HR/9
1.9
 
Fastball
95.0 mph
 
ERA
2.79
 
WHIP
0.93
 
BABIP
.156
 
GB/FB
0.70
 
Left On Base
96.8%
 
Exit Velocity
85.4 mph
 
Barrels/BBE
2.9%
 
Spin Rate
2533 rpm
 
Balls Hit 95+ MPH
35.3%
 
Swinging Strike
9.9%
 
Prospect Rankings History
Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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More Fantasy News
Competing for bullpen spot
PHouston Astros
February 23, 2026
Teng has impressed the Astros' staff early in spring, giving him a chance to make the Opening Day roster, per Chandler Rome of The Athletic.
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Headed to Houston
PHouston Astros
January 29, 2026
Teng was traded from the Giants to the Astros in exchange for a minor-league player on Thursday, Robert Murray of FanSided.com reports.
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Fans six in three-inning start
PSan Francisco Giants
September 20, 2025
Teng allowed two runs on a hit and two walks while striking out six over three innings in a no-decision versus the Dodgers on Saturday.
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Decent in no-decision
PSan Francisco Giants
September 15, 2025
Teng allowed one unearned run on two hits and a walk while striking out five over four innings in a no-decision versus the Diamondbacks on Monday.
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Fans eight in Sunday's loss
PSan Francisco Giants
September 7, 2025
Teng (2-4) took the loss against the Cardinals on Sunday, allowing four runs on three hits and five walks while striking out eight across four innings.
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