Royals vs Mariners Prediction and MLB Tips - 18 September 2025
Last updated: Sep 17, 2025, 11:35PM | Published: Sep 17, 2025, 7:30PM
The Kansas City Royals will sqaure off with the Seattle Mariners in MLB action at Kauffman Stadium on Thursday, starting at 9:40am AEST.
Cole Ragans (2-3, 5.18 ERA) will be on the bump for the Royals, while the Mariners will counter with Bryce Miller (4-5, 5.59 ERA).
This article features Stats Insider's free betting tips for the Royals vs Mariners game, as well as the latest betting odds in Australia.
Who Will Win?
Based on advanced machine learning and data, Stats Insider has simulated the outcome of Thursday's Kansas City vs Seattle MLB game 10,000 times.
Our proven predictive analytics model gives the Royals a 56% chance of defeating the Mariners at Kauffman Stadium.
Royals vs Mariners: Odds
The current betting odds in Australia for Thursday's MLB game at Kauffman Stadium are listed below:
- Head to Head: Royals $1.80, Mariners $2.05
- Line: Royals -1.5 ($2.65), Mariners +1.5 ($1.50)
- Total (Over/Under 8.5 Runs): Over $1.91, Under $1.91
Odds are correct at the time of publication and subject to change.
Looking at the latest head-to-head odds, the bookmakers currently have the Royals at $1.80 and the Mariners at $2.05.
The Royals are 1.5-run favourites against the Mariners, with odds of $2.65 available at TAB.
For the underdog Mariners (+1.5) to cover the line, TAB offers odds of $1.50.
The over/under for total runs scored is set at 8.5 with TAB, which has odds of $1.91 for the over and $1.91 for the under.
According to Stats Insider's model, the Mariners (+1.5) are predicted to cover the line 62% of the time, while the 8.5-run over/under is expected to go over 51% of the time.
Royals vs Mariners: Best Bets
- Head to Head: Kansas City at $1.80 with TAB
- Line: Royals -1.5 at $2.65 with TAB
- Total Runs: Under 8.5 at $1.91 with TAB
Stats Insider's Royals vs Mariners predictions are based on market-leading simulations and betting intelligence to help you place smarter bets with your chosen online bookie.
Although the Mariners are more likely to cover the line, our best bet of Royals -1.5 is based on the likelihood of that happening, as suggested by our predictive analytics model, and the top odds available.
Furthermore, despite the Over being more likely to hit in this game, Under 8.5 is our best bet because of the better odds ($1.91) that are available from TAB.
Royals vs Mariners: Prediction
Stats Insider provides full betting coverage of the Kansas City vs Seattle game on Thursday, including data-driven predictions and live scorestips.
Remember, our model updates regularly, so refresh this page for the latest betting analysis before the Kansas City vs Seattle game.
As always, see Stats Insider's Best Bets for the best tips on every MLB game, as well as predictions for a wide range of other sports.
Royals vs Mariners: Essential Details
The match-up between the Royals and Mariners at Kauffman Stadium is scheduled to begin at 9:40am AEST on Thursday.
- Teams: Kansas City Royals vs Seattle Mariners
- Date: Thursday 18 September 2025
- Time: 9:40am AEST
- Venue: Kauffman Stadium
All dates and times mentioned in this article are in Australian Eastern Standard Time (AEST), unless otherwise stated.
Conclusion
Our Kansas City vs Seattle predictions are the result of 10,000 data-driven simulations of the game, all curated by our team of skilled data scientists and analysts. We use cutting-edge technology and machine learning to ensure our MLB tips are accurate and reliable, giving you the knowledge you need to make informed decisions with confidence.
If you decide to use our predictions for betting purposes, it's vital to gamble responsibly and know when to stop. For free and confidential support, call 1800 858 858 or visit gamblinghelponline.org.au.
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