The Royals will play the Mariners on Sunday, May 3rd, 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
- Matchup Stats
- Best Odds
- Interactive Odds Example
- Prop Bets
- Team Futures Odds
- Team Pages
- Team Standings
- Other Games Today
Key Matchup Stats
- SportsBetting3.com Power Rankings - The Kansas City Royals have a 85.67 power ranking. The power ranking for the Seattle Mariners is 91.00.
- Visiting Kansas City Royals - The Kansas City Royals have a 2-10 record as a visiting team, ranking them 8th Overall for visiting team wins.
- Home Seattle Mariners - The Seattle Mariners have a 9-7 record as a home team. They rank 1st for home team wins in the Overall standings.
- Runs Scored - The Kansas City Royals currently stand 21st (82) Overall, with the Seattle Mariners ranking 17th (96) for runs scored.
- Runs Allowed - The Kansas City Royals are 8th (115) Overall for runs allowed. The Seattle Mariners stand 16th (95) for runs allowed.
- Team Streaks - The Kansas City Royals won their last game. Meanwhile, the Seattle Mariners have lost their last 2 games.
- Team Records - The Kansas City Royals have a 8-16 Overall record (5.5 GB American Central Division), with the Seattle Mariners possessing a 10-15 Overall standing (3.5 GB American West Division).
Best Royals at Mariners Odds
| Underdog Kansas City Royals | Favorite Seattle Mariners |
|---|---|
| Over | Under |
|---|---|
| Underdog Seattle Mariners | Favorite Kansas City Royals |
|---|---|
Matchup Odds FAQs
The Seattle Mariners are the -125 moneyline favorite at BetMGM and the Kansas City Royals are the +105 moneyline underdog at BetMGM.
The best over line is 8 -102 runs at BetMGM, which means you risk $102 to win $100 betting the over. The best under line is 8 -118 runs at BetMGM, and that means you risk $118 to win $100 betting the under.
The Kansas City Royals are -1.5 +170 run line favorites at BetMGM, while the Seattle Mariners are +1.5 -210 run line underdogs at BetMGM.
MLB Odds Example
|
Game |
 BetMGMBet |
|---|---|
Royals
Mariners
5/03/26 4:10pm EDT | +105-125 |
- Kansas City Royals bettors risk $100 to win $105 at +105 odds. The implied probability for Kansas City Royals is 48.78%.
- Seattle Mariners bettors risk $100 to win $80 at -125 odds. The implied probability for Seattle Mariners is 55.56%.
Kansas City Royals at Seattle Mariners Prop Bets
| BetMGM Bet |
|
|---|---|
Royals
Mariners
First Team to Score
5/03/26 4:10pm EDT | -155+120Bet |
Royals
Mariners
Tie
1st Inning Winner
5/03/26 4:10pm EDT | +300+300-140Bet |
Royals
Mariners
Tie
First 3 Innings Winner
5/03/26 4:10pm EDT | +145+140+275Bet |
Royals
Mariners
To Extra Innings
5/03/26 4:10pm EDT | Yes +725No -1200Bet |
| BetMGM | |
Royals
Mariners
1st Team to Score Will Win
5/03/26 4:10pm EDT | Yes -250No +190Bet |
Royals
Total Runs
KAN at SEA 5/03/26 4:10pm EDT | 3.5 o -1303.5 u +100Bet |
Mariners
Total Runs
KAN at SEA 5/03/26 4:10pm EDT | 3.5 o -1403.5 u +105Bet |
Kansas City Royals & 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.
Kansas City Royals World Series Odds|
Team | BetMGM |
|---|---|
| Royals | +6600 Bet |
|
Team | BetMGM |
|---|---|
| Mariners | +1300 Bet |
Kansas City Royals & 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Seattle Mariners | 37 | 36 | 0.507 | +10.0 | 19-16 | 18-20 | 311 | 291 | +20 | L2 | 4-6 |
| Kansas City Royals | 29 | 44 | 0.397 | +18.0 | 17-21 | 12-23 | 291 | 344 | -53 | L1 | 4-6 |
How to Bet on the Game
Time needed: 4 minutes.
How to Bet on the Kansas City Royals 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, May 3rd, 2026 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 Kansas City Royals vs Seattle Mariners Game.
Navigate to the sportsbook's MLB page. Next, look for live or upcoming matchups. Select the Kansas City Royals 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 May 3, 2026 MLB Games
- Toronto Blue Jays vs Minnesota Twins
- Baltimore Orioles vs New York Yankees
- Cincinnati Reds vs Pittsburgh Pirates
- Milwaukee Brewers vs Washington Nationals
- Houston Astros vs Boston Red Sox
- Philadelphia Phillies vs Miami Marlins
- San Francisco Giants vs Tampa Bay Rays
- Los Angeles Dodgers vs St. Louis Cardinals
- Arizona Diamondbacks vs Chicago Cubs
- Atlanta Braves vs Colorado Rockies
- Cleveland Guardians vs Oakland Athletics
- New York Mets vs Los Angeles Angels
- Chicago White Sox vs San Diego Padres
- Texas Rangers vs Detroit Tigers