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
#365
ADP
Signed a one-year, $786,700 contract with the Astros in March of 2026.
Struggles again Monday
PHouston Astros
June 15, 2026
Teng (3-6) took the loss against Detroit on Monday, allowing five runs on six hits and two walks while striking out nine batters over 3.1 innings.
Analysis
It's not often that a starter has dominant swing-and-miss stuff and still gets crushed, but that's exactly what happened to Teng on Monday. The right-hander racked up 14 whiffs on 81 pitches, and nine of the 10 outs he recorded came on strikeouts, but everything else about his line was ugly. Teng served up three long balls, hit two batters and logged his shortest start since becoming fully stretched out as part of the rotation. He seemed to be settling in as a starter over the second half of May, posting a 1.69 ERA and 1.13 WHIP over his final three starts of that month. However, the wheels have fallen off since the calendar turned to June. In three starts this month, Teng has allowed a whopping 17 runs (14 earned) across 12.1 frames.
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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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Pitching Appearances Breakdown
Average Pitch Count
44
Last 10 Games
68
Last 5 Games
88
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
 
 
-10%
BAA vs RHP
2026
 
 
-30%
BAA vs RHP
2025
 
 
-6%
BAA vs RHP
2024
 
 
-44%
BAA vs LHP
BAA Batters K BB H 2B 3B HR
Since 2024vs Left .264 215 48 24 48 9 1 8
Since 2024vs Right .238 214 56 27 43 6 0 5
2026vs Left .272 123 29 17 28 6 1 7
2026vs Right .190 112 29 9 19 2 0 2
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
 
 
-18%
ERA on Road
2026
 
 
-14%
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 6.25 1.61 40.1 3 4 0 8.9 5.8 1.8
Since 2024Away 5.10 1.41 54.2 2 6 0 10.5 4.1 0.8
2026Home 4.60 1.40 29.1 2 3 0 10.4 4.9 2.5
2026Away 3.96 1.28 25.0 1 3 0 8.6 3.6 0.4
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
More Splits View More Split Stats
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
2.23
 
K/9
9.6
 
BB/9
4.3
 
HR/9
1.5
 
Fastball
93.7 mph
 
ERA
4.31
 
WHIP
1.34
 
BABIP
.285
 
GB/FB
1.53
 
Left On Base
72.8%
 
Exit Velocity
83.3 mph
 
Barrels/BBE
3.1%
 
Spin Rate
2505 rpm
 
Balls Hit 95+ MPH
23.9%
 
Swinging Strike
11.6%
 
Prospect Rankings History
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Defensive Stats
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Stats Vs Today's Lineup
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Recent RotoWire Articles Featuring Kai-Wei Teng See More
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More Fantasy News
Crushed by Angels
PHouston Astros
June 9, 2026
Teng (3-5) took the loss Tuesday, allowing seven runs (five earned) on seven hits and three walks while striking out five batters over four innings against the Angels.
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Takes fourth loss
PHouston Astros
June 4, 2026
Teng (3-4) took the loss against Pittsburgh on Thursday, allowing five runs (four earned) on seven hits and two walks while striking out one batter over five-plus innings.
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Hurt by homers in no-decision
PHouston Astros
May 29, 2026
Teng didn't factor into the decision Friday against the Brewers, allowing three runs on three hits and four walks with seven strikeouts across five innings.
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Posts another scoreless start
PHouston Astros
May 23, 2026
Teng (3-3) notched the victory over the Cubs on Saturday, allowing two hits and walking three batters while striking out six over six scoreless innings.
Analysis
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Tosses five scoreless frames in win
PHouston Astros
May 16, 2026
Teng (2-3) earned the win against the Rangers on Saturday, allowing two hits and four walks while striking out seven across five scoreless innings.
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