The Mariners will play the Cubs on Thursday, March 12th, 2026. Your timezone's first pitch time is 4:05 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 Odds
- Interactive Odds Example
- Prop Bets
- Team Futures Odds
- Team Pages
- Team Standings
- Other Games Today
Best Mariners at Cubs Odds
| Underdog Seattle Mariners | Favorite Chicago Cubs |
|---|---|
| Over | Under |
|---|---|
| Underdog Seattle Mariners | Favorite Chicago Cubs |
|---|---|
Matchup Odds FAQs
The Chicago Cubs are the -145 moneyline favorite at BetMGM and the Seattle Mariners are the +120 moneyline underdog at BetMGM.
The best over line is 11.5 -115 runs at BetMGM, which means you risk $115 to win $100 betting the over. The best under line is 11.5 -105 runs at BetMGM, and that means you risk $105 to win $100 betting the under.
The Chicago Cubs are -1.5 +135 run line favorites at BetMGM, while the Seattle Mariners are +1.5 -155 run line underdogs at BetMGM.
MLB Odds Example
|
Game |
 BetMGMBet |
|---|---|
Mariners
Cubs
3/12/26 4:05pm EDT | +120-145 |
- Seattle Mariners bettors risk $100 to win $120 at +120 odds. The implied probability for Seattle Mariners is 45.45%.
- Chicago Cubs bettors risk $100 to win $68.97 at -145 odds. The implied probability for Chicago Cubs is 59.18%.
Seattle Mariners at Chicago Cubs Prop Bets
| BetMGM Bet |
|
|---|---|
Mariners
Cubs
3/12/26 4:05pm EDT | Pending BetMGM |
Seattle Mariners & Chicago Cubs 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.
Seattle Mariners World Series Odds|
Team | BetMGM |
|---|---|
| Mariners | +1300 Bet |
|
Team | BetMGM |
|---|---|
| Cubs | +2000 Bet |
Seattle Mariners & Chicago Cubs 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Chicago Cubs | 0 | 0 | 0.000 | 0.0 | 0-0 | 0-0 | 0 | 0 | 0 | - | 0 |
| Seattle Mariners | 0 | 0 | 0.000 | 0.0 | 0-0 | 0-0 | 0 | 0 | 0 | - | 0 |
How to Bet on the Game
Time needed: 4 minutes.
How to Bet on the Seattle Mariners vs Chicago Cubs 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 Thursday, March 12th, 2026 at 4:05 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 Seattle Mariners vs Chicago Cubs Game.
Navigate to the sportsbook's MLB page. Next, look for live or upcoming matchups. Select the Seattle Mariners vs Chicago Cubs 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 March 12, 2026 MLB Games
- New York Yankees vs Detroit Tigers - 3/12/26 1:05pm EDT
- Boston Red Sox vs Minnesota Twins - 3/12/26 1:05pm EDT
- Toronto Blue Jays vs Philadelphia Phillies - 3/12/26 1:05pm EDT
- New York Mets vs St. Louis Cardinals - 3/12/26 1:05pm EDT
- Oakland Athletics vs Texas Rangers - 3/12/26 4:05pm EDT
- Colorado Rockies vs Arizona Diamondbacks - 3/12/26 4:10pm EDT
- Washington Nationals vs Houston Astros - 3/12/26 6:05pm EDT
- Atlanta Braves vs Pittsburgh Pirates - 3/12/26 6:05pm EDT
- Milwaukee Brewers vs Cleveland Guardians - 3/12/26 9:05pm EDT
- Cincinnati Reds vs Los Angeles Dodgers - 3/12/26 9:05pm EDT
- Chicago White Sox vs San Francisco Giants - 3/12/26 9:05pm EDT
- Kansas City Royals vs San Diego Padres - 3/12/26 9:10pm EDT