The Cubs will play the Mariners on Saturday, March 21st, 2026. Your timezone's first pitch time is 9:10 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.

STATE	Bonus

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Interactive Odds Example
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Best Cubs at Mariners Odds

**Best Moneyline Betting Odds**
TBD	TBD

Moneyline odds are updating, please check back soon.

**Best Total Betting Odds**
Over	Under

Total odds are updating, please check back soon.

**Best Run Line Betting Odds**
TBD	TBD

Run Line odds are updating, please check back soon.

MLB Odds Example

MLB Odds and Outcomes Explained
Game	Book

Chicago Cubs at Seattle Mariners Prop Bets

MLB Prop Bets
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	Bet
Cubs Mariners 3/21/26 9:10pm EDT	Pending

Chicago Cubs & 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.

Chicago Cubs World Series Odds

No World Series TM Chicago Cubs YR: futures available

Seattle Mariners World Series Odds

No World Series TM Seattle Mariners YR: futures available

Chicago Cubs & 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 - Chicago Cubs, Seattle Mariners
Team	W	L	Pct	GB	Home	Away	RS	RA	Diff	Strk	L10
Chicago Cubs	58	45	0.563	+7.5	30-22	28-23	523	457	+66	W1	6-4
Seattle Mariners	51	53	0.490	+15.0	30-23	21-30	419	403	+16	L3	4-6

How to Bet on the Game

Time needed: 4 minutes.

How to Bet on the Chicago Cubs vs Seattle Mariners MLB Game

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 Saturday, March 21st, 2026 at 9:10 pm EDT, making sure to enter all your personal details correctly. Don't forget to add your bonus code.
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.
Tap to the sportsbook's MLB page, look for the Chicago Cubs vs Seattle Mariners Game.
Navigate to the sportsbook's MLB page. Next, look for live or upcoming matchups. Select the Chicago Cubs vs Seattle Mariners Game.
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 21, 2026 MLB Games

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Chicago Cubs vs Seattle Mariners Odds

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