Seattle Mariners at Houston Astros Odds, Picks & Prediction

Matchup Preview: Mariners vs. Astros

On Monday, May 11, 2026, the Seattle Mariners travel to Houston to face the Astros in a crucial late-season matchup. The consensus odds favor Seattle, with the Mariners listed at -143 on the moneyline and the Astros at +1.5 on the spread. Recent form strongly supports this valuation: Seattle enters with a 5-5 record in their last 10 games and a winning streak (W1), while Houston has struggled recently, posting a 4-6 record in their last 10 and losing their last game (L1).

The Mariners have been the more potent offensive team, averaging 3.8 points per game (PPG) compared to Houston’s 3.1 PPG. Defensively, Seattle has allowed 3.9 PPG, slightly better than Houston’s 4.1 PPG allowed. This data suggests Seattle is more balanced and consistent, making them the logical favorite despite the Astros' home-field advantage.

By The Numbers

Stat	Houston Astros (Home)	Seattle Mariners (Away)
Record (Last 10)	4-6	5-5
Scoring (PPG)	3.1	3.8
Allowed (PPG)	4.1	3.9
Current Streak	L1	W1

Key Injuries

No significant injuries have been reported for either the Seattle Mariners or the Houston Astros. Both teams are expected to field their strongest available lineups for this Monday night contest.

Odds Analysis

The moneyline odds of -143 for Seattle imply a roughly 58.8% probability of victory, while Houston’s +120 odds suggest a 45.5% probability. The +1.5 run line for Houston is priced attractively, offering value if bettors believe the Astros can keep the game close despite their recent losses. However, Seattle’s ability to score nearly 0.7 more runs per game on average makes covering the spread a strong possibility.

Player Props to Watch

Several high-profile players offer interesting fantasy score opportunities:

• Shohei Ohtani: With a fantasy score over/under of 9.5 (Over +100), Ohtani remains the highest-scoring prop available, reflecting his dual-threat capability.
• Mookie Betts: The over/under is set at 6.5 (Over +100). Betts’ consistency makes this a viable target against a Mariners defense that allows 0.8 strikeouts per game to pitchers.
• Teoscar Hernandez & Kyle Tucker: Both players have over/unders set at 5.5 and 6.5 respectively (Over +100). Hernandez faces a Houston pitching staff that allows 0.93 strikeouts per game to outfielders, suggesting favorable contact opportunities.

Best Bets

1. Seattle Mariners -1.5: Seattle’s superior recent form and higher scoring output make them well-positioned to cover the spread. The Astros’ 4.1 PPG allowed suggests Seattle’s offense can find runs.
2. Over 8.5 Runs: While Houston’s offense has slowed (3.1 PPG), Seattle’s 3.8 PPG average, combined with Houston’s defensive vulnerabilities, points toward a moderate-to-high scoring game.
3. Shohei Ohtani Fantasy Score Over 9.5 (+100): Ohtani’s unique skill set provides the highest floor among all listed players, making this prop a solid value play.

Prediction

Based on the data, Seattle Mariners are the safer pick. They are playing better baseball (5-5 L10 vs 4-6 L10), scoring more runs (3.8 vs 3.1), and allowing fewer runs (3.9 vs 4.1). The Astros’ recent loss and lower offensive production make it difficult for them to keep up. We predict a 5-3 victory for the Seattle Mariners.

Updated Monday, May 11, 2026. All odds and stats powered by SportsClaw — real-time data from 40+ sportsbooks. Get picks on Telegram →