Introduction

Baltimore Orioles’ recent home trends and Seattle Mariners’ current surge set the stage for a sharp MLB prediction in this matchup. The Mariners have ripped off a 5‑0 run in their last five, averaging 4.2 runs per game, but the Orioles’ prior head‑to‑head dominance and their ability to control tempo suggest a different outcome here. With Baltimore Orioles’ recent contests averaging just 6.8 total runs, the pace points toward a lower‑scoring game where their situational edges can decide it.

Game Time

Slated for Wednesday, August 13 at 06:35 PM ET in Oriole Park at Camden Yards, hitter-leaning conditions.

Odds & Spread Line

• Seattle Mariners: -156
• Baltimore Orioles: +123

Total: 8.5

• Run Line — Seattle Mariners: -1.5 (+117)
• Run Line — Baltimore Orioles: +1.5 (-137)

Latest Team Records

Seattle Mariners: 66-53 (Win %: 0.555)
Baltimore Orioles: 53-65 (Win %: 0.449)

Injury Report

Seattle Mariners are missing Jonathan Hernandez (Undisclosed), listed as Day-To-Day.

Baltimore Orioles are missing Albert Suarez (Shoulder), listed as 60-Day-IL; Zach Eflin (Back), listed as 15-Day-IL; Felix Bautista (Shoulder), listed as 15-Day-IL. No other significant injuries are reported.

Key Player Stats

Seattle Mariners

• Cal Raleigh: 0.247 AVG, 45 HR, 98 RBI
• Eugenio Suarez: 0.235 AVG, 37 HR, 92 RBI
• Josh Naylor: 0.292 AVG, 15 HR, 66 RBI

Baltimore Orioles

• Gunnar Henderson: 0.284 AVG, 14 HR, 50 RBI
• Jackson Holliday: 0.251 AVG, 14 HR, 44 RBI
• Jordan Westburg: 0.266 AVG, 14 HR, 29 RBI

Team Analysis

Seattle Mariners

Seattle Mariners’ 66‑53 record reflects a team in rhythm, and their 5‑0 surge over the last five games with 4.2 RPG has reinforced confidence on the road. Cal Raleigh’s power production continues to anchor timely scoring, while Josh Naylor has delivered consistent contact that extends innings. However, despite respectable road form at 30‑28, they face a Baltimore side that has already handled them in most recent meetings, making this spot less favorable than the win streak suggests.

Eugenio Suarez’s ability to change games with one swing has been a factor in their 9‑1 run over the last 10, yet the Mariners’ scoring has remained in the mid‑4s on average, leaving less room for error against teams that limit offensive opportunities. Baltimore Orioles’ pitching profile has been sufficient to slow similar lineups, and Seattle Mariners’ road scoring efficiency will be tested in a venue where they have struggled historically.

• Batting Average: 0.243
• Total Runs Scored: 547
• Home Runs: 171
• OPS: 0.732
• ERA: 3.81
• WHIP: 1.23

Away Record: 30-28 • Home Record: 37-25
Last 5 Games: 5-0 (4.2 RPG)
Last 10 Games: 9-1 (5.0 RPG)

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Baltimore Orioles

Baltimore Orioles’ 53‑65 mark disguises a competitive core that has taken three of the last four from Seattle, including two one‑run wins. Gunnar Henderson’s balanced production and Jackson Holliday’s emerging impact give them the ability to manufacture runs without relying solely on the long ball. Even with a 2‑3 record in their last five, their 28‑30 home record suggests they can hold serve in this environment.

Jordan Westburg’s contributions in clutch spots have complemented a pitching staff that has kept recent games low‑scoring, aligning with their 2.3 RPG over the last 10. While the offense has been inconsistent, the Orioles have leveraged situational hitting and late‑inning execution to edge teams in tight games. Against a Mariners lineup that has not solved them in prior meetings, Baltimore Orioles’ home situational edge is a decisive factor.

• Batting Average: 0.24
• Total Runs Scored: 505
• Home Runs: 144
• OPS: 0.71
• ERA: 4.85
• WHIP: 1.41

Away Record: 25-36 • Home Record: 28-30
Last 5 Games: 2-3 (2.6 RPG)
Last 10 Games: 3-7 (2.3 RPG)

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Head-to-Head History

Baltimore Orioles lead 3–1 (Last 4 games)

• August 12, 2025: SEA 1 @ BAL 0
• June 05, 2025: BAL 4 @ SEA 3
• June 04, 2025: BAL 3 @ SEA 2
• June 03, 2025: BAL 5 @ SEA 1

Over/Under Trends

Seattle Mariners’ last 10 games have averaged 8.4 total runs, with 6 games that would have cleared today’s total of 8.5.

Baltimore Orioles’ last 10 games have averaged 6.8 combined runs, with 2 games clearing the same number of 8.5.

Moneyline Betting Prediction

Baltimore Orioles’ prior success in this series, combined with their ability to keep games within reach at home, positions them for another win. Their 3–1 head‑to‑head edge over Seattle this season underscores matchup familiarity, and their low‑scoring style neutralizes the Mariners’ recent offensive rhythm. With Henderson, Holliday, and Westburg providing timely production, Baltimore holds the situational advantage needed to convert at home.

The Baltimore Orioles at +123 fit a live underdog profile on recent numbers.

Over/Under Prediction

Last five form shows the Baltimore Orioles at 2.6 RPG and the Seattle Mariners at 4.2, giving context for the number.

These teams are combining for 6.8 runs per game recently — below the posted total of 8.5. That leans to a Under 8.5.

Bookmakers

Odds courtesy of: BetOnline.ag, LowVig.ag, Caesars, FanDuel, DraftKings, MyBookie.ag, Bovada, BetUS, Fanatics, BetMGM, BetRivers.

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