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Game-Day Update Lineups: Probable Odds Posted 5 min read

Arizona Diamondbacks vs Baltimore Orioles Preview

Arizona Diamondbacks visit Baltimore Orioles with Ryne Nelson facing TBD starter. Low 5.2 run total projects tight contest at Camden Yards

Arizona Diamondbacks at Baltimore Orioles MLB game preview for April 13, 2026
ARI
Arizona Diamondbacks
Ryne Nelson RHP
@
6:35 PM ET
Oriole Park at Camden Yards
BAL
Baltimore Orioles
Dean Kremer ?HP
Last updated Monday, April 13, 2026
Final This game has finished. Read the recap for final score, model grades, and box score.

Key Facts

Matchup
Arizona Diamondbacks at Baltimore Orioles
Date
Monday, April 13, 2026
First Pitch
6:35 PM ET
Venue
Oriole Park at Camden Yards
Probable Starters
Ryne Nelson (RHP) vs Dean Kremer (?HP)
Lineups
Probable
Odds Snapshot
Apr 13, 6:36 PM ET
Last Updated
Apr 13, 7:07 AM ET

Betting Board

Snapshot Apr 13, 6:36 PM ET
Moneyline
ARI +115
BAL -125
Total
Over 9 -105
Under 9 -115
Run Line
ARI +1.5 -196
BAL -1.5 +162

Model Angles

NRFI Model
NRFI · 53%
+2.2% edge
Projected Total
5.2
model combined runs
Park Factor
1.03
Neutral · HR 1.08
First Pitch Weather
81°F
14.3 mph SW
The Arizona Diamondbacks visit the Baltimore Orioles at Oriole Park at Camden Yards on Monday evening with first pitch scheduled for 6:35 PM ET. Arizona enters at 9-7 on a one-game winning streak, while Baltimore stands at 8-7 and has won two straight. The Diamondbacks will send right-hander Ryne Nelson to the mound, who carries a 4.20 ERA with a 1.07 WHIP and 7.20 strikeouts per nine innings. The Orioles have yet to announce their starting pitcher. The projected total sits at 5.2 runs with both teams projected at 2.6 runs apiece. Weather conditions call for 85 degrees with a 13 mph wind blowing from the southwest. The park factor stands at 1.03 runs, and the no-run first inning probability registers at 57 percent with a 3.0 percent edge.
  • Ryne Nelson brings 4.20 ERA and 1.07 WHIP to the bump
  • Baltimore has not yet announced their starting pitcher
  • Projected total of 5.2 runs with NRFI at 57 percent

Pitching Matchup

ARI Away
Ryne Nelson
RHP · 1-1 · 3 GS
ERA
4.20
WHIP
1.07
K/9
7.20
IP
15.0
Career: 4.18 ERA · 1.22 WHIP · 7.13 K/9
NRFI: 80.4%
1st Inn ERA: 3.44
BAL Home
?HP · undefined-undefined · undefined GS
ERA
undefined
WHIP
undefined
K/9
undefined
IP
undefined
Career: undefined ERA · undefined WHIP · undefined K/9
NRFI: 69.6%
1st Inn ERA: 4.91
  • K projections: Ryne Nelson at 4.7 (line 4.5)
  • Dean Kremer projected at 4.4 (line 5.5).
  • First-inning scoring: Ryne Nelson holds a 80.4% career NRFI rate, Dean Kremer at 69.6%. Combined average: 75.0%.
  • This is a RHP vs ?HP matchup, creating potential platoon advantages in both lineups.

Strikeout Projections

Ryne Nelson vs BAL
Proj: 4.7Line: 4.5
+0.2
Confidence:
Dean Kremer vs ARI
Proj: 4.4Line: 5.5
-1.1
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.

Ryne Nelson (Arizona Diamondbacks) is projected for 4.7 strikeouts against a posted line of 4.5. The projection sits 0.2 K above the line, giving the model a Neutral lean at 4/10 confidence.
Win probability on this lean: 50%.
He faces a moderate-K lineup that strikes out at 22.0% with a 28.0% whiff rate.

Dean Kremer (Baltimore Orioles) is projected for 4.4 strikeouts against a posted line of 5.5. The projection sits 1.1 K below the line, giving the model a Neutral lean at 6/10 confidence.
Win probability on this lean: 50%.
He faces a moderate-K lineup that strikes out at 22.0% with a 28.0% whiff rate.

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

NRFI & First 5 Analysis

NRFI Model
53.4%
probability of NRFI
+2.2%
market edge
Monitor
Market implied: 51.2%Model: 53.4%
First 5 Innings
2.9est. F5 runs
ARI
4.20 ERA
5.0 inn/start
BAL
— ERA
F5 lean: Slight BAL
ARI K Projection
Ryne Nelson
4.7proj
Line: 4.5
+0.2 NEUTRAL
Confidence
BAL K Projection
Dean Kremer
4.4proj
Line: 5.5
-1.1 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 53.4% probability of no runs in the first inning, compared to the market's implied probability of 51.2%.

  • That creates a slim 2.2% edge on NRFI.
  • The best available line is NRFI -105 / YRFI -115 at FanDuel.
  • Publication tier: slate_only.
  • Home plate umpire Brennan Miller runs a average zone. See the umpire section below for full career data.
  • Our NRFI model sits at 7-11 (38.9%) 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
64.4%
Home Run Elite 0.5
18.2%
Ketel Marte
Home Run Elite 0.5
16.4%
Home Run Very Strong 0.5
14.8%
Home Run Very Strong 0.5
14.8%
See all today's picks and edges

Lineup & Matchup Breakdown

Arizona Diamondbacks Projected
K%: 22.0
2Ketel MarteS2B
3Corbin CarrollLRF
Whiff rate: 28.0%Team page
Baltimore Orioles Projected
K%: 22.0
1Gunnar HendersonLSS
2Pete AlonsoR1B
4Taylor WardRLF
Whiff rate: 28.0%Team page
Batter vs Pitcher matchup tool

Lineups are projected as of this writing.

Lineup K vulnerability: 22.0% strikeout rate, 28.0% whiff rate.

Lineup 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
Brennan Miller
Slightly wide NRFI: 55.1% 89 games
Full umpire profile
Hourly Game Forecast
81°
6 PM
14 mph
SW
79°
7 PM
11 mph
SW
79°
8 PM
11 mph
SW
79°
9 PM
11 mph
SW
  • 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: 81F with 14 mph winds from the SW. Humidity: 40%.
  • Wind advisory: 14 mph winds from the SW may impact fly balls.
  • Home plate umpire: Brennan Miller.
  • Career NRFI rate: 55.1% across 89 games tracked.
  • Zone tendency: Slightly wide.
  • K factor: 0.992 (league average strikeouts in his games).

Run Projections & Total

  • Our projection model puts the total at 5.2 combined runs, with Arizona Diamondbacks projected for 2.6 and Baltimore Orioles for 2.6.
  • That's 3.8 runs below the posted total of 9.0, suggesting a lean toward the Under.
  • The run projection is essentially a coin flip between these two teams.
The Bottom Line
Arizona visits Baltimore with Ryne Nelson on the mound against an undecided Orioles starter. The low projected total of 5.2 runs and high NRFI probability reflect uncertainty around the pitching matchup and offensive environment at Camden Yards.
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.