Neil Parker
• Betting Analyst
16+ years betting experience
Updated:
May 14, 2026 , 10:09 AM ET
• 4 min read
Houston cashes in against Luis Castillo in series finale.
Photo By – Reuters Connect. Houston Astros starting pitcher Mike Burrows.
The Seattle Mariners and Houston Astros finish off a four-game AL West series at Daikin Park on Thursday, May 14, and my top Mariners vs. Astros predictions and MLB picks expect Houston to eke out a win this afternoon in the series finale.
Who will win Mariners vs Astros today: Astros moneyline (+117)
The rubber has hit the road for Seattle Mariners righty Luis Castillo, and his annual statistical decline has hit rock bottom through eight 2026 starts. His average fastball velocity has dropped each of the past four seasons while his xFIP has also climbed in sync to his current, career-high 4.34 mark.
This isn’t a layup matchup against the Houston Astros for Seattle, either.
Houston is third in wOBA against right-handed pitchers, and Astros starter Mike Burrows has found a groove across his past three starts with a 2.50 ERA while holding opposing hitters to a 30.6% hard-hit rate.
COVERS INTEL: Seattle Mariners starting pitcher Luis Castillo has surrendered an alarming 58.3% hard-hit rate across his past three starts.
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Mariners vs Astros Over/Under pick: Under 9.5 (-125)
While the sum of Castillo’s statistical parts isn’t pretty, there have been a few signs, with the righty allowing three earned runs or fewer in four of his eight starts. Additionally, his highlighted xFIP is well below his 6.57 ERA, and there is screaming statistical correction coming to his unsustainable .364 BABIP and 59.0% strand rate.
Add the potential for both teams to rest regulars in this afternoon series finale, and I’m anticipating both starters to put enough zeros on the scoreboard to keep this total Under the number Thursday.
Neil Parker’s 2026 Transparency Record
ML/RL bets: 20-11, +10.05 units
Over/Under bets: 12-6, +5.37 units
Mariners vs Astros odds
Moneyline: Mariners -125 | Astros +105
Run line: Mariners -1.5 (+130) | Astros +1.5 (-150)
Over/Under: Over 9.5 (+105) | Under 9.5 (-125)
Mariners vs Astros trend
The Seattle Mariners have hit the Under in 14 of their last 22 away games (+6.50 Units / 27% ROI). Find more MLB betting trends for Mariners vs. Astros.
How to watch Mariners vs Astros and game info
Location
Daikin Park, Houston, TX
Date
Thursday, May 14, 2026
First pitch
2:10 p.m. ET
TV
Mariners.TV, SCHN
Mariners starting pitcher
Luis Castillo
(0-4, 6.57 ERA)
Astros starting pitcher
Mike Burrows
(2-4, 5.04 ERA)
Mariners vs Astros latest injuries
Mariners vs Astros weather
Odds are correct at the time of publishing and are subject to change.
Not intended for use in MA.
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Neil Parker is, first and foremost, a sports fan. A huge supporter of the Cowboys, Cubs, and Maple Leafs, he has managed to parlay his passion into writing gigs at some of the top websites in the industry.
Neil takes a numbers-based approach to his handicapping and complements his in-depth statistical analysis with a keen eye on the markets to provide the best available odds. He loves to lean on his rolodex of idioms to offset his inner nerd. When it comes to wagering, he throws down on anything that catches his eye at bet365, Betway and BetVictor. He also keeps a close eye on CoolBet because the polar bear brand often has outlier NHL and NFL moneyline prices.
Neil graduated with honors from St. Thomas University in 2007 before completing his BEd at Acadia University in 2010. After teaching a myriad of courses and subjects, he found a groove delivering fun lessons to exceptional learners in non-traditional classroom environments. If his decade-plus teaching run taught him anything about sports betting, it’s to stay the course and use the summer – or offseason – to refresh and prepare to be better in the year to come.
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