The Astros will play the Mariners on Sunday, July 21st, 2024. Your timezone's first pitch time is 4:10 pm EDT. Check local listings or your nearest streaming app for coverage.
Learn more about MLB Betting with our handy tutorial and guide. We explain money line, total and run line bets. Plus, a great discussion about exotic bets like MLB Baseball parlays and props.
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Table of Contents
- Matchup Stats
- Captain Shady Lines
- Best Odds
- Interactive Odds Example
- Prop Bets
- Team Futures Odds
- Team Pages
- Team Standings
- Other Games Today
Key Matchup Stats
- SportsBetting3.com Power Rankings - As the 2024 season continues, the Houston Astros possess a 94.00 SportsBetting3.com power ranking. The Seattle Mariners now have a 90.33 power ranking. Teams with a higher SportsBetting3.com power ranking will typically be moneyline favorites.
- Visiting Houston Astros - The Houston Astros head into this matchup with a 24-25 record as a visiting team. This standing ranks them 8th Overall for visiting team wins.
- Home Seattle Mariners - The Seattle Mariners will throw the first pitch possessing a 30-20 home team record. That puts them 4th for home team wins in the Overall MLB standings.
- Runs Scored - Houston Astros batters have produced 464 runs, ranking them 7th Overall, with the Seattle Mariners ranking 23rd (381) for runs scored.
- Runs Allowed - Houston Astros pitchers and fielders have allowed 410 runs, ranking them 18th Overall for runs allowed. Meanwhile, the Seattle Mariners now rank 27th Overall, allowing 367 runs.
- Team Streaks - The Houston Astros have won their last 2 games. Their opponent, the Seattle Mariners have lost their last 5 games.
- Team Records - Let's review each team's records. The Houston Astros have a 52-46 Overall record (0.0 GB American West Division), with the Seattle Mariners notching a 52-48 Overall standing (1.0 GB American West Division).
Captain Shady Lines
A broken compass is right at least twice a day.
Avast ye scallywags! The Astros be takin' on the Mariners in Seattle...
Houston's on a hot streak, winnin' 6 out of their last 10... (but don't let that fool ye, they be needin' to keep it up!)
The Mariners be strugglin', only winnin' 3 out of their last 10... (they be needin' to turn the tide or walk the plank!)
The battle on the diamond be fierce, bet yer pieces o' eight... (check out this game's prop bets below, and may the best team win!)
Bet on MLB baseball at legal US sportsbooks, if ye dare... (but beware, the outcome be as unpredictable as a storm at sea!)
Review each team's standing at the bottom of the page... (and may the baseball gods favor the team with the strongest will!)
Best Astros at Mariners Odds
| Underdog Houston Astros | Favorite Seattle Mariners |
|---|---|
| Over | Under |
|---|---|
| Underdog Houston Astros | Favorite Seattle Mariners |
|---|---|
Matchup Odds FAQs
The Seattle Mariners are the -120 moneyline favorite at BetMGM and the Houston Astros are the +100 moneyline underdog at BetMGM.
The best over line is 7.5 -115 runs at BetMGM, which means you risk $115 to win $100 betting the over. The best under line is 7.5 -105 runs at BetMGM, and that means you risk $105 to win $100 betting the under.
The Seattle Mariners are -1.5 +165 run line favorites at BetMGM, while the Houston Astros are +1.5 -200 run line underdogs at BetMGM.
MLB Odds Example
|
Game |
 BetMGMBet |
|---|---|
Astros
Mariners
7/21/24 4:10pm EDT | +100-120 |
- Houston Astros bettors risk $100 to win $100 at +100 odds. The implied probability for Houston Astros is 50%.
- Seattle Mariners bettors risk $100 to win $83.33 at -120 odds. The implied probability for Seattle Mariners is 54.55%.
Houston Astros at Seattle Mariners Prop Bets
| BetMGM Bet |
|
|---|---|
Astros
Mariners
First Team to Score
7/21/24 4:10pm EDT | -140+110Bet |
Astros
Mariners
Tie
1st Inning Winner
7/21/24 4:10pm EDT | +340+280-145Bet |
Astros
Mariners
Tie
First 3 Innings Winner
7/21/24 4:10pm EDT | +155+135+260Bet |
Astros
Mariners
To Extra Innings
7/21/24 4:10pm EDT | Yes +675No -1100Bet |
| BetMGM | |
Astros
Mariners
1st Team to Score Will Win
7/21/24 4:10pm EDT | Yes -250No +190Bet |
Astros
Total Runs
HOU at SEA 7/21/24 4:10pm EDT | 3.5 o -1203.5 u -110Bet |
Mariners
Total Runs
HOU at SEA 7/21/24 4:10pm EDT | 3.5 o -1303.5 u +100Bet |
Bryan Woo
Strikeouts Thrown
HOU at SEA 7/21/24 4:10pm EDT | 3.5 o -1603.5 u +125Bet |
| BetMGM | |
Ronel Blanco
Strikeouts Thrown
HOU at SEA 7/21/24 4:10pm EDT | 6.5 o +1056.5 u -135Bet |
Houston Astros & Seattle Mariners Futures Odds
Latest World Series odds, if available, for each team. Review odds for other teams and learn how to bet on the tournament. See past Championship results and learn how to bet World Series teasers, props and parlays.
Houston Astros World Series Odds|
Team | BetMGM |
|---|---|
| Astros | +1400 Bet |
|
Team | BetMGM |
|---|---|
| Mariners | +2500 Bet |
Houston Astros & Seattle Mariners Team Pages
Review each team's season win total odds, futures odds, betting bonuses and other valuable information on our exclusive team betting odds pages. Team betting odds and stats update throughout the season:
Team Standings
| Team | W | L | Pct | GB | Home | Away | RS | RA | Diff | Strk | L10 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| x - Houston Astros | 88 | 73 | 0.547 | +9.5 | 46-35 | 42-38 | 740 | 649 | +91 | W2 | 6-4 |
| e - Seattle Mariners | 85 | 77 | 0.525 | +13.0 | 49-32 | 36-45 | 676 | 607 | +69 | W4 | 8-2 |
How to Bet on the Game
Time needed: 4 minutes.
How to Bet on the Houston Astros vs Seattle Mariners MLB Game
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Open a new sports betting account before game time.
Review our list of sports betting sites. Open a new account before the game starts on Sunday, July 21st, 2024 at 4:10 pm EDT, making sure to enter all your personal details correctly. Don't forget to add your bonus code.
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Visit the sportsbook’s cashier, banking, or deposit page.
Navigate to the sportsbook's deposit page. Use your Visa card or MasterCard, or deposit with a bank transfer, or other methods like Paypal.
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Tap to the sportsbook's MLB page, look for the Houston Astros vs Seattle Mariners Game.
Navigate to the sportsbook's MLB page. Next, look for live or upcoming matchups. Select the Houston Astros vs Seattle Mariners Game.
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Choose your bet and place a wager.
Choose your bet and then use the funds you deposited to place a wager. The sportsbook will pay your winnings or deduct a losing wager from your account balance after the game.
Other July 21, 2024 MLB Games
- St. Louis Cardinals vs Atlanta Braves
- Tampa Bay Rays vs New York Yankees
- Philadelphia Phillies vs Pittsburgh Pirates
- Cincinnati Reds vs Washington Nationals
- Detroit Tigers vs Toronto Blue Jays
- New York Mets vs Miami Marlins
- San Diego Padres vs Cleveland Guardians
- Milwaukee Brewers vs Minnesota Twins
- Chicago White Sox vs Kansas City Royals
- Arizona Diamondbacks vs Chicago Cubs
- Baltimore Orioles vs Texas Rangers
- San Francisco Giants vs Colorado Rockies
- Los Angeles Angels vs Oakland Athletics
- Boston Red Sox vs Los Angeles Dodgers