Seattle Mariners vs Houston Astros Picks, Prediction, Odds, and Line Movement for Monday May 11 2026
Use Code WWWC The Seattle Mariners and Houston Astros meet on May 11, 2026, in a starting-pitching matchup that lines up perfectly for a low-scoring early innings game. Peter Lambert has been outstanding since joining Houston, George Kirby has historically dominated the Astros' lineup, and both teams are coming off cold offensive weekends. For more MLB picks on the rest of the slate, we have you covered, but this Mariners-Astros spot is built for a first-five Under play because the matchup math points squarely at a quiet opening half.
Quick Picks and Prediction
- First Five Pick: Under 4.5 Runs (-120)
- Moneyline Pick: Astros +119
- Projected Final Score: Houston 3, Seattle 2
Odds and Line Movement
Seattle has held favorite status throughout the cycle, opening at -136 and settling around -143 with Houston bouncing between +113 and +123. The total has climbed from 8 up to 8.5, with juice now sitting in the -122 to +102 range on the latest pull. Public money is firmly on Seattle, while the Over has dropped from 100% earlier in the day to a more even 60% on the most recent sample. Here is the complete picture.
Opening Odds
| Date | Time | SEA | HOU | Total |
|---|---|---|---|---|
| 05/10 | 04:33:38PM | -136 | +113 | 8½ -106 / 8½ -114 |
Current Odds
| Date | Time | SEA | HOU | Total |
|---|---|---|---|---|
| 05/11 | 01:29:23AM | -143 | +119 | 8½ -122 / 8½ +102 |
Line Movement - Moneyline
| Date | Time | Seattle | Houston | Public ($, #) |
|---|---|---|---|---|
| 05/11 | 01:29:23AM | -143 | +119 | SEA 79%, SEA 70% |
| 05/10 | 10:41:06PM | -149 | +123 | SEA 78%, SEA 80% |
| 05/10 | 04:47:37PM | -143 | +119 | |
| 05/10 | 04:33:38PM | -136 | +113 |
Line Movement - Total
| Date | Time | Over | Under | Public ($, #) |
|---|---|---|---|---|
| 05/11 | 09:15:56AM | 8½ -122 | 8½ +102 | OV 60%, UN 70% |
| 05/11 | 09:10:25AM | 8½ -115 | 8½ -105 | OV 60%, UN 70% |
| 05/11 | 09:08:55AM | 8½ -112 | 8½ -108 | OV 57%, UN 75% |
| 05/11 | 08:47:40AM | 8½ -108 | 8½ -112 | OV 57%, UN 75% |
| 05/11 | 08:20:24AM | 8½ -106 | 8½ -114 | OV 65%, UN 73% |
| 05/11 | 07:29:09AM | 8½ -106 | 8½ -113 | OV 78%, UN 63% |
| 05/11 | 07:17:24AM | 8½ -106 | 8½ -114 | OV 78%, UN 63% |
| 05/11 | 05:22:23AM | 8½ -106 | 8½ -113 | OV 80%, UN 58% |
| 05/11 | 05:22:09AM | 8½ -107 | 8½ -113 | OV 80%, UN 58% |
| 05/11 | 05:21:53AM | 8½ -106 | 8½ -113 | OV 80%, UN 58% |
| 05/11 | 03:56:08AM | 8½ -107 | 8½ -113 | OV 84%, OV 50% |
| 05/11 | 03:45:23AM | 8½ -106 | 8½ -113 | OV 84%, OV 50% |
| 05/11 | 03:40:08AM | 8½ -107 | 8½ -113 | OV 84%, OV 50% |
| 05/11 | 03:26:38AM | 8½ -106 | 8½ -113 | OV 80%, UN 60% |
| 05/11 | 01:29:23AM | 8½ -107 | 8½ -113 | OV 95%, OV 50% |
| 05/11 | 12:33:23AM | 8 -118 | 8 -102 | OV 100%, OV 100% |
| 05/10 | 11:00:52PM | 8 -115 | 8 -105 | OV 100%, OV 100% |
| 05/10 | 09:16:22PM | 8 -118 | 8 -102 | OV 100%, OV 100% |
| 05/10 | 08:02:21PM | 8 -115 | 8 -105 | |
| 05/10 | 08:02:06PM | 8½ -102 | 8½ -118 | |
| 05/10 | 08:01:36PM | 8½ -103 | 8½ -117 | |
| 05/10 | 07:45:51PM | 8½ -102 | 8½ -118 | |
| 05/10 | 07:40:21PM | 8½ -108 | 8½ -112 | |
| 05/10 | 06:58:37PM | 8½ -112 | 8½ -108 | |
| 05/10 | 06:47:06PM | 8½ -107 | 8½ -113 | |
| 05/10 | 04:33:38PM | 8½ -106 | 8½ -114 |
Mariners vs Astros Key Matchups and Handicap
During a season that's been filled with injuries and disappointment thus far, newly-acquired starting pitcher Peter Lambert has been welcomed with open arms in Houston. After spending four seasons with the Rockies, Lambert has adjusted well to his new home with a 2.42 ERA in his first four starts with the Astros. In his last outing against the Dodgers, Lambert held them scoreless for 7.0 innings while allowing three hits.
Since moving from Coors Field to Daikin Park, Lambert's strikeout rate has climbed from 17.9-percent last year to 24.7-percent so far this season. His expected batting average allowed has dropped from .261 last year to .205 so far this season. That is the profile of a pitcher who has genuinely improved with the change of scenery, not a fluke based on a small sample of starts.
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Lambert will need to bring his A-game on Monday because the opposing starting pitcher has done very well against the Astros' lineup in the past. Houston's current roster is hitting .183 in 99 plate appearances against Seattle's George Kirby with a miniscule 3.0-percent walk rate and a .195 weighted on-base average. Jose Altuve is 3-for-25 with no extra-base hits and Yordan Alvarez is 3-for-19 with six strikeouts. In those 99 plate appearances, Kirby has only allowed two extra-base hits (a pair of doubles).
The recent form makes the case even stronger. Houston has scored an average of 3.0 runs per game over its last seven games, and the Astros were held to a total of one run on Saturday and Sunday as they were beaten soundly by the Reds in Cincinnati. Things didn't go much better for the Mariners in Chicago as Seattle was held to a total of two runs on Saturday and Sunday in a pair of losses to the White Sox. Two cold offenses, two starters performing well, and one starter with a dominant history against the opposing lineup — that is a recipe for a quiet opening half.
Betting Trends SEA vs HOU
- Peter Lambert owns a 2.42 ERA across his first four starts with Houston.
- Lambert tossed 7.0 scoreless innings against the Dodgers in his last outing.
- His strikeout rate has jumped from 17.9% to 24.7% with the move to Houston.
- Lambert's expected batting average against has dropped from .261 to .205.
- Houston's current roster is hitting just .183 in 99 plate appearances against George Kirby.
- Kirby has allowed only two extra-base hits (both doubles) in 99 plate appearances against this Houston roster.
- Jose Altuve is 3-for-25 lifetime against Kirby with no extra-base hits.
- Yordan Alvarez is 3-for-19 with six strikeouts against Kirby.
- Houston is averaging 3.0 runs per game over its last seven contests.
- Seattle was held to two total runs in back-to-back losses to the White Sox over the weekend.
Key Injuries and Notes SEA vs HOU
- Houston is dealing with a season that has been filled with injuries and offensive disappointment.
- Peter Lambert is fully healthy and locked into the rotation following his trade from Colorado.
- Kirby's matchup edge over Houston's core bats — Altuve and Alvarez — is the biggest individual matchup factor.
- Both clubs are coming off back-to-back losses where the offense was suppressed.
- The lineups have not been generating consistent traffic over the past week.
First Five and Total Picks
Backing the First Five Under 4.5 Runs at -120 is the cleanest way to attack this matchup. Both starters are pitching at a high level right now, Kirby has historically dominated this Houston lineup with a .195 wOBA across nearly 100 plate appearances, and Lambert is coming off a 7.0 inning scoreless outing against the Dodgers. With Houston averaging just 3.0 runs per game over the last week and Seattle scoring two combined runs over the weekend, the first five innings should be especially quiet.
On the full game total, the Under 8.5 is the right secondary play. The total has moved up from 8 to 8.5, but the matchup math has not changed: two cold offenses, two starters in form, and a Kirby-versus-Houston track record that is overwhelmingly one-sided. Even if a bullpen breaks late, the early innings should keep this game well under the number.
- First Five Pick: Under 4.5 Runs (-120)
- Total Pick: Under 8.5
Final Score Prediction
- Houston 3, Seattle 2
Expect Kirby to navigate Houston's struggling lineup with ease through five, Lambert to follow up his Dodgers gem with another quality outing, and the bullpens to surrender a handful of runs late as Houston scratches out a 3-2 win in a game that easily clears Under 8½ on the full and Under 4.5 in the opening five.
How to Bet Mariners vs Astros
This is a matchup where the right total number matters more than the side, because the full-game total has already moved from 8 to 8½ and the first-five number can offer better juice depending on the book. Shopping for First Five Under 4½ at the best available price is critical when the recommendation is a -120 priced market. If you do not have access to traditional sportsbooks in your state, social sportsbooks are available nationwide and carry full MLB markets including first-five totals, full-game totals, and player props on Altuve, Alvarez and Julio Rodriguez.
For bettors who want a low-risk way to play the First Five Under or the full-game Under on this matchup, take advantage of the fliff promo code to add value to your first deposit and ride the Under with extra Fliff Coins in your bankroll. Whether you are firing the first-five total, grabbing a Lambert or Kirby strikeout prop, or playing the full-game Under with confidence given two cold lineups and two sharp starters, having multiple platforms and the right pricing is what separates a profitable MLB Monday from a frustrating one.
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