Mariners vs Astros Prediction, Odds & Player Prop Bets Today

Mariners vs Astros Overview
The Seattle Mariners visit Daikin Park to take on the Houston Astros on May 12, 2026. First pitch is scheduled for 8:10 pm in Houston, TX. The game will be televised on MRTV | SCHN.

Season ATS Records
This season, the Mariners are 20-22 against the spread (ATS), while the Astros are 16-26 ATS.

Starting Pitchers
Mariners starting pitcher: Bryan Woo (2-2, 4.00 ERA). Astros starting pitcher: Tatsuya Imai (1-0, 7.57 ERA).

Odds, Spread, and Totals
Spread: Mariners -1.5 at +120; Astros +1.5 at -145.
Over/Under: 8.5 with the Over at -102 and the Under at -118.
Moneyline: Mariners -145; Astros +120.

Prediction
Mariners win 58.4%

Betting Options and Projections
We’ve highlighted some favorite MLB player prop bets for Mariners players for Tuesday’s game, looking at profitable historical betting trends: Cole Young with Walks Under in 18 of his last 20 games (+13.25 Units / 28% ROI); Josh Naylor with Home Runs Over in 3 of his last 9 away games (+12.60 Units / 140% ROI); Cal Raleigh with Hits Under in his last 9 games (+12.10 Units / 134% ROI); Luke Raley with Singles Under in 14 of his last 15 games (+11.85 Units / 36% ROI); Cole Young with Runs Under in his last 10 games (+10.00 Units / 47% ROI). For the Astros: Braden Shewmake with Home Runs Over in 2 of his last 4 games (+17.00 Units / 425% ROI); Yordan Alvarez with Runs Over in 18 of his last 25 games at home (+10.55 Units / 35% ROI); Cam Smith with Hits Under in 9 of his last 10 games at home (+10.45 Units / 104% ROI); Yordan Alvarez with Walks Under in 16 of his last 20 games (+10.40 Units / 37% ROI); Yordan Alvarez with RBIs Under in 13 of his last 15 games (+9.80 Units / 36% ROI).

Team Totals and Game Trends
The Mariners have hit the Team Total Under in 17 of their last 24 away games (+8.40 Units / 29% ROI). They have also hit the 1st Five Innings (F5) Team Total Under in 30 of their last 50 away games (+8.15 Units / 14% ROI), and the Game Total Under in 13 of their last 20 away games (+6.50 Units / 30% ROI). They have covered the 1st Five Innings (F5) Run Line in 4 of their last 5 games (+3.05 Units / 58% ROI) and have hit the Moneyline in 7 of their last 10 away games (+3.05 Units / 22% ROI). The Astros have hit the Game Total Over in 21 of their last 30 games at home (+11.90 Units / 35% ROI), the 1st Five Innings (F5) Team Total Over in 27 of their last 45 games (+8.20 Units / 16% ROI), and the Team Total Under in 10 of their last 13 games (+5.90 Units / 36% ROI).