Cincinnati Reds vs Seattle Mariners Odds

The Reds will play the Mariners on Sunday, March 15th, 2026. 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

Best Reds at Mariners Odds


Best Moneyline Betting Odds
Underdog

Cincinnati Reds
Favorite

Seattle Mariners
The Seattle Mariners are the -120 moneyline favorite. Risk $120 to win $100 on the Seattle Mariners at BetMGM. The Cincinnati Reds are the +100 underdog at BetMGM. Risk $100 to win $100 on the Cincinnati Reds. Learn more about how to bet on money lines.

Best Total Betting Odds
OverUnder
BetMGM has the best over line of 11.5 runs. Risk $110 to win $100. BetMGM has the best under line of 11.5 runs. Risk $110 to win $100. Our tutorial explains more about total bets.

Best Run Line Betting Odds
Underdog

Cincinnati Reds
Favorite

Seattle Mariners
The Seattle Mariners have a -1.5 +165 run line at BetMGM OH. They are the run line favorite in this matchup. The Cincinnati Reds have a +1.5 -200 run line at BetMGM OH. The Cincinnati Reds are the run line underdogs. Review how to bet on a point spread with our text and video tutorials.

Matchup Odds FAQs

What is the moneyline for the Cincinnati Reds vs Seattle Mariners MLB game on Sunday, March 15th, 2026?

The Seattle Mariners are the -120 moneyline favorite at BetMGM and the Cincinnati Reds are the +100 moneyline underdog at BetMGM.

What is the over-under total line for the Cincinnati Reds vs Seattle Mariners MLB game on Sunday, March 15th, 2026?

The best over line is 11.5 -110 runs at BetMGM, which means you risk $110 to win $100 betting the over. The best under line is 11.5 -110 runs at BetMGM, and that means you risk $110 to win $100 betting the under.

What is the run line for the Cincinnati Reds vs Seattle Mariners MLB game on Sunday, March 15th, 2026?

The Seattle Mariners are -1.5 +165 run line favorites at BetMGM, while the Cincinnati Reds are +1.5 -200 run line underdogs at BetMGM.

MLB Odds Example

MLB Odds and Outcomes Explained

Game
BetMGM Sports Betting BetMGM
Bet
Reds
Mariners
3/15/26 4:10pm EDT
+100-120
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Possible Moneyline Outcomes
  • Cincinnati Reds bettors risk $100 to win $100 at +100 odds. The implied probability for Cincinnati Reds is 50%.
  • Seattle Mariners bettors risk $100 to win $83.33 at -120 odds. The implied probability for Seattle Mariners is 54.55%.

Cincinnati Reds at Seattle Mariners Prop Bets

MLB Prop Bets
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Reds
Mariners
3/15/26 4:10pm EDT
Pending BetMGM

Cincinnati Reds & 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.

Cincinnati Reds World Series Odds
2026 Cincinnati Reds World Series Odds

Team
BetMGM Sports Betting BetMGM
Reds
+5000
Bet
Seattle Mariners World Series Odds
2026 Seattle Mariners World Series Odds

Team
BetMGM Sports Betting BetMGM
Mariners
+1300
Bet

Cincinnati Reds & 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

2026 MLB Regular Season Standings - Cincinnati Reds, Seattle Mariners
Team W L Pct GB Home Away RS RA Diff Strk L10
Cincinnati Reds010.000+1.50-10-003-3L10-1
Seattle Mariners010.000+1.50-10-046-2L10-1

How to Bet on the Game

Time needed: 4 minutes.

How to Bet on the Cincinnati Reds vs Seattle Mariners MLB Game

  1. 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, March 15th, 2026 at 4:10 pm EDT, making sure to enter all your personal details correctly. Don't forget to add your bonus code.

  2. 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.

  3. Tap to the sportsbook's MLB page, look for the Cincinnati Reds vs Seattle Mariners Game.

    Navigate to the sportsbook's MLB page. Next, look for live or upcoming matchups. Select the Cincinnati Reds vs Seattle Mariners Game.

  4. 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.

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