The Royals will play the Mariners on Thursday, July 3rd, 2025. Your timezone's first pitch time is 10:10 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 2025 season continues, the Kansas City Royals possess a 91.33 SportsBetting3.com power ranking. The Seattle Mariners now have a 93.67 power ranking. Teams with a higher SportsBetting3.com power ranking will typically be moneyline favorites.
- Visiting Kansas City Royals - The Kansas City Royals head into this matchup with a 12-16 record as a visiting team. This standing ranks them 6th Overall for visiting team wins.
- Home Seattle Mariners - The Seattle Mariners will throw the first pitch possessing a 13-11 home team record. That puts them 7th for home team wins in the Overall MLB standings.
- Runs Scored - Kansas City Royals batters have produced 183 runs, ranking them 24th Overall, with the Seattle Mariners ranking 11th (238) for runs scored.
- Runs Allowed - Kansas City Royals pitchers and fielders have allowed 184 runs, ranking them 26th Overall for runs allowed. Meanwhile, the Seattle Mariners now rank 16th Overall, allowing 219 runs.
- Team Streaks - The Kansas City Royals lost their last game. Their opponent, the Seattle Mariners have lost their last 2 games.
- Team Records - Let's review each team's records. The Kansas City Royals have a 29-26 Overall record (7.0 GB American Central Division), with the Seattle Mariners notching a 29-23 Overall standing (0.0 GB American West Division).
Captain Shady Lines
A broken compass is right at least twice a day.
Avast ye scallywags! The Royals face the Mariners in Seattle on Thursday...
This be a battle of two evenly matched crews on the diamond...
With similar records, both teams be hungry for a victory...
Raise the Jolly Roger and set sail for victory, Kansas City!
(check out this game's prop bets below)
Don't be a landlubber, bet on MLB baseball at legal US sportsbooks...
The Royals be lookin' to plunder a win on enemy territory...
While the Mariners be aimin' to defend their home turf with all their might...
Review each team's standing at the bottom of the page and may the best crew win!
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 -120 moneyline favorite at BetMGM and the Kansas City Royals are the +100 moneyline underdog at BetMGM.
The best over line is 7.5 -105 runs at BetMGM, which means you risk $105 to win $100 betting the over. The best under line is 7.5 -115 runs at BetMGM, and that means you risk $115 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
7/03/25 10:10pm EDT | +100-120 |
- Kansas City Royals bettors risk $100 to win $100 at +100 odds. The implied probability for Kansas City Royals is 50%.
- Seattle Mariners bettors risk $100 to win $83.33 at -120 odds. The implied probability for Seattle Mariners is 54.55%.
Kansas City Royals at Seattle Mariners Prop Bets
| BetMGM Bet |
|
|---|---|
Royals
Mariners
First Team to Score
7/03/25 10:10pm EDT | -150+115Bet |
Royals
Mariners
Tie
1st Inning Winner
7/03/25 10:10pm EDT | +320+325-155Bet |
Royals
Mariners
Tie
First 3 Innings Winner
7/03/25 10:10pm EDT | +154+145+250Bet |
Royals
Mariners
To Extra Innings
7/03/25 10:10pm EDT | Yes +700No -1100Bet |
| BetMGM | |
Royals
Mariners
1st Team to Score Will Win
7/03/25 10:10pm EDT | Yes -250No +190Bet |
Royals
Total Runs
KAN at SEA 7/03/25 10:10pm EDT | 3.5 o -1183.5 u -110Bet |
Mariners
Total Runs
KAN at SEA 7/03/25 10:10pm EDT | 3.5 o -1253.5 u -105Bet |
Logan Evans
Strikeouts Thrown
KAN at SEA 7/03/25 10:10pm EDT | 3.5 o -1303.5 u +100Bet |
| BetMGM | |
Seth Lugo
Strikeouts Thrown
KAN at SEA 7/03/25 10:10pm EDT | 5.5 o -1055.5 u -120Bet |
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 | +15000 Bet |
|
Team | BetMGM |
|---|---|
| Mariners | +3000 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 | 29 | 23 | 0.558 | +5.0 | 13-11 | 16-12 | 238 | 219 | +19 | L2 | 6-4 |
| Kansas City Royals | 29 | 26 | 0.527 | +6.5 | 17-10 | 12-16 | 183 | 184 | -1 | 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 Thursday, July 3rd, 2025 at 10:10 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 July 3, 2025 MLB Games
- Minnesota Twins vs Miami Marlins - 7/03/25 12:10pm EDT
- Houston Astros vs Colorado Rockies - 7/03/25 3:10pm EDT
- Detroit Tigers vs Washington Nationals - 7/03/25 6:45pm EDT
- New York Yankees vs Toronto Blue Jays - 7/03/25 7:07pm EDT
- Milwaukee Brewers vs New York Mets - 7/03/25 7:10pm EDT
- Los Angeles Angels vs Atlanta Braves - 7/03/25 7:15pm EDT
- Cleveland Guardians vs Chicago Cubs - 7/03/25 8:04pm EDT
- San Francisco Giants vs Arizona Diamondbacks - 7/03/25 9:40pm EDT
- Chicago White Sox vs Los Angeles Dodgers - 7/03/25 10:10pm EDT