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Houston Astros vs Baltimore Orioles Preview

Houston Astros visit Baltimore Orioles Friday at 6:35 PM ET. Kai-Wei Teng's 2.16 ERA faces Shane Baz's 5.08 mark at Oriole Park at Camden Yards

Houston Astros at Baltimore Orioles MLB game preview for April 28, 2026
HOU
Houston Astros
Kai-Wei Teng RHP
@
6:35 PM ET
Oriole Park at Camden Yards
BAL
Baltimore Orioles
Shane Baz RHP
Last updated Tuesday, April 28, 2026
Final This game has finished. Read the recap for final score, model grades, and box score.

Key Facts

Matchup
Houston Astros at Baltimore Orioles
Date
Tuesday, April 28, 2026
First Pitch
6:35 PM ET
Venue
Oriole Park at Camden Yards
Probable Starters
Kai-Wei Teng (RHP) vs Shane Baz (RHP)
Lineups
Projected
Odds Snapshot
Apr 28, 6:36 PM ET
Last Updated
Apr 28, 6:08 PM ET

Betting Board

Snapshot Apr 28, 6:36 PM ET
Moneyline
HOU +118
BAL -126
Total
Over 9 -115
Under 9 -105
Run Line
HOU +1.5 -166
BAL -1.5 +138

Model Angles

NRFI Model
NRFI · 58%
+4.3% edge
Projected Total
2.0
model combined runs
Park Factor
1.03
Neutral · HR 1.08
First Pitch Weather
62°F
8.6 mph SSE
The Houston Astros travel to Oriole Park at Camden Yards on Friday evening to face the Baltimore Orioles in a 6:35 PM ET first pitch. Houston enters on a one-game winning streak with an 11-18 record, while Baltimore sits at 13-15 following a two-game losing streak. Right-hander Kai-Wei Teng takes the ball for the Astros with a 2.16 ERA, 0.90 WHIP, and 8.64 strikeouts per nine innings. The Orioles counter with right-hander Shane Baz, who carries a 5.08 ERA, 1.55 WHIP, and 7.31 strikeouts per nine. Weather conditions call for 62 degrees with nine-mile-per-hour winds blowing from the south-southeast. The park factor sits at 1.03 runs. Teng is projected for 5.3 strikeouts against a line of 5.5, while Baz is projected for 4.8 strikeouts versus a 4.5 line.
  • Kai-Wei Teng brings 2.16 ERA and 0.90 WHIP to Camden Yards
  • Shane Baz owns 5.08 ERA and 1.55 WHIP for Orioles
  • Daniel Johnson posts 12.5 percent barrel rate in key matchup

Pitching Matchup

HOU Away
Kai-Wei Teng
RHP · 1-1 · 0 GS
ERA
2.16
WHIP
0.90
K/9
8.64
IP
16.2
Career: 5.81 ERA · 1.47 WHIP · 9.73 K/9
BAL Home
Shane Baz
RHP · 0-2 · 5 GS
ERA
5.08
WHIP
1.55
K/9
7.31
IP
28.1
Career: 4.32 ERA · 1.26 WHIP · 9.05 K/9
NRFI: 73.7%
1st Inn ERA: 5.55

On the season, Kai-Wei Teng holds the ERA edge in this matchup. Kai-Wei Teng carries a 2.16 ERA and 0.90 WHIP, while Shane Baz sits at 5.08 ERA and 1.55 WHIP.
Strikeout rates: Kai-Wei Teng at 8.64 K/9, Shane Baz at 7.31 K/9.
K projections: Kai-Wei Teng at 5.3 (line 5.5)
Shane Baz projected at 4.8 (line 4.5).
Shane Baz has a 73.7% career NRFI rate. No first-inning data available for Kai-Wei Teng.
Both starters throw from the R side, limiting platoon splits for either lineup.

Strikeout Projections

Kai-Wei Teng vs BAL
Proj: 5.3Line: 5.5
-0.2
Confidence:
Shane Baz vs HOU
Proj: 4.8Line: 4.5
+0.3
Confidence:
View all K projections on SlateIQ

Our strikeout model weighs pitcher K rate, opponent lineup whiff tendency, park factors, and umpire zone size to project total strikeouts per starter.

Kai-Wei Teng (Houston Astros) is projected for 5.3 strikeouts against a posted line of 5.5. The projection is close to the line with no actionable edge.
He faces a moderate-K lineup that strikes out at 22.0% with a 28.0% whiff rate.

Shane Baz (Baltimore Orioles) is projected for 4.8 strikeouts against a posted line of 4.5. The projection is close to the line with no actionable edge.
He faces a moderate-K lineup that strikes out at 22.0% with a 28.0% whiff rate.

The Houston Astros lineup is more vulnerable to strikeouts in this matchup. Baltimore Orioles batters K at 22.0%, Houston Astros batters at 22.0%.

NRFI & First 5 Analysis

NRFI Model
57.8%
probability of NRFI
+4.3%
market edge
Monitor
Market implied: 53.5%Model: 57.8%
First 5 Innings
1.1est. F5 runs
HOU
2.16 ERA
BAL
5.08 ERA
5.6 inn/start
F5 lean: Strong HOU
HOU K Projection
Kai-Wei Teng
5.3proj
Line: 5.5
-0.2 NEUTRAL
Confidence
BAL K Projection
Shane Baz
4.8proj
Line: 4.5
+0.3 NEUTRAL
Confidence
Explore all model projections

Our NRFI model analyzes both starting pitchers' first-inning profiles, the top-of-order hitters in each lineup, the umpire's historical zone, and environmental factors to produce a probability estimate. For this game, the model assigns a 57.8% probability of no runs in the first inning, compared to the market's implied probability of 53.5%.

  • That creates a slim 4.3% edge on NRFI.
  • The best available line is NRFI -115 / YRFI -105 at FanDuel.
  • Home plate umpire Jordan Baker runs a average zone. See the umpire section below for full career data.
  • Our NRFI model sits at 31-29 (51.7%) on official picks this season.

Prop Edges

6 model signals detected
Hits (1+) Lean Hit 0.5
66.8%
Hits (1+) Lean Hit 0.5
65.3%
Hits (1+) Lean Hit 0.5
65.1%
Yordan Alvarez
Home Run Elite 0.5
17.2%
Hits (1+) Lean Hit 0.5
64.2%
Home Run Very Strong 0.5
15.6%
See all today's picks and edges

Lineup & Matchup Breakdown

Houston Astros Projected
K%: 22.0
5Daniel JohnsonLCF
Whiff rate: 28.0%Team page
Baltimore Orioles Projected
Projected batting order unavailable. This will update when probable or confirmed lineup data is available.
Batter vs Pitcher matchup tool

Lineups are projected as of this writing.

Houston Astros K vulnerability: 22.0% strikeout rate, 28.0% whiff rate.

Ballpark, Weather & Umpire

Oriole Park at Camden Yards
Run Factor1.03
HR Factor1.08
Full park profile
Home Plate Umpire
Jordan Baker
Average NRFI: 57.0% 86 games
Full umpire profile
Hourly Game Forecast
62°
6 PM
9 mph
SSE
61°
7 PM
7 mph
SE
61°
8 PM
7 mph
SE
61°
9 PM
7 mph
SE
  • Oriole Park at Camden Yards carries a 1.03 run factor (neutral).
  • Home run factor: 1.08 — the park elevates HR power.
  • Park notes: Left field wall angles away; Narrow left field alley; Elevated field area.
  • First pitch forecast: 62F with 9 mph winds from the SSE. Humidity: 54%.
  • Wind advisory: 9 mph winds from the SSE may impact fly balls.
  • Home plate umpire: Jordan Baker.
  • Career NRFI rate: 57.0% across 86 games tracked.
  • Zone tendency: Average.
  • K factor: 0.999 (league average strikeouts in his games).

Run Projections & Total

  • Our projection model puts the total at 2.0 combined runs, with Houston Astros projected for 2.0 and Baltimore Orioles for 0.0.
  • That's 7.0 runs below the posted total of 9.0, suggesting a lean toward the Under.
  • The run projection favors Houston Astros by 2.0 runs.
The Bottom Line
Teng's superior ERA and WHIP give Houston a clear pitching advantage over Baz, who has posted significantly weaker ratios. The no-run-first-inning probability stands at 58 percent with a 4.3 percent edge. Teng projects close to his strikeout line while Baz sits just above his number.
This preview is generated from thecapper.io projection models and publicly available data. All projections are model estimates, not guarantees. Gamble responsibly. If you or someone you know has a gambling problem, call 1-800-GAMBLER.