Rockies vs Mariners Prediction and MLB Tips - 21 September 2026
Last updated: Sep 20, 2026, 7:10PM | Published: Sep 20, 2026, 1:28AM
The Colorado Rockies will take on the Seattle Mariners in MLB action at Coors Field on Monday, starting at 5:10am AEST.
The Rockies will have Tomoyuki Sugano (12-10, 5.49 ERA) start, while the Mariners will counter with Kade Anderson (1-2, 5.33 ERA).
This article features Stats Insider's free betting tips for the Rockies vs Mariners game, along with the latest betting odds in Australia.
Who Will Win?
Based on trusted computer power and data, Stats Insider has simulated the result of Monday's Colorado vs Seattle MLB match-up 10,000 times.
Our proven predictive analytics model gives the Mariners a 61% chance of defeating the Rockies at Coors Field.
Rockies vs Mariners: Odds
The current betting odds in Australia for Monday's MLB game at Coors Field are shown here:
- Head to Head: Rockies $2.40, Mariners $1.61
- Line: Rockies +1.5 ($1.91), Mariners -1.5 ($1.91)
- Total (Over/Under 11 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 Rockies at $2.40 and the Mariners at $1.61.
The Rockies are listed as 1.5-run underdogs against the Mariners, with odds of $1.91 available at TAB.
For the favourite Mariners (-1.5) to cover the line, TAB offers odds of $1.91.
The over/under for total runs scored is set at 11 with TAB, which has odds of $1.91 for the over and $1.91 for the under.
According to Stats Insider's analytics model, the Mariners (-1.5) are predicted to cover the line 51% of the time, while the 11-run over/under is expected to go over 54% of the time.
Rockies vs Mariners: Betting Tips
- Head to Head: Seattle at $1.61 with TAB
- Line: Mariners -1.5 at $1.91 with TAB
- Total Runs: Over 11 at $1.91 with TAB
These Rockies vs Mariners predictions are based on market-leading modelling and gambling intelligence to provide you with the best possible advice 24/7.
Rockies vs Mariners: Prediction
Stats Insider provides full coverage of the Colorado vs Seattle game on Monday, including data-driven predictions and expert tips.
Remember, our model updates frequently, so keep checking this page for the latest betting analysis before the Colorado vs Seattle match-up.
As always, see Stats Insider's Best Bets for the best tips for every MLB game, as well as predictions for a wide range of other sports.
Rockies vs Mariners: Essential Details
The match-up between the Rockies and Mariners at Coors Field is scheduled to begin at 5:10am AEST on Monday.
- Teams: Colorado Rockies vs Seattle Mariners
- Date: Monday 21 September 2026
- Time: 5:10am AEST
- Venue: Coors Field
All dates and times mentioned in this article are in Australian Eastern Standard Time (AEST), unless otherwise noted.
Conclusion
Our Colorado vs Seattle predictions are the result of 10,000 data-driven simulations of the game, all curated by our team of expert data scientists and analysts. We use cutting-edge technology and machine learning to ensure our MLB tips are trustworthy and reliable, giving you the confidence to make informed decisions.
If you decide to use our predictions for betting purposes, it's crucial that you gamble responsibly and manage your finances effectively. For free and confidential support, call 1800 858 858 or visit gamblinghelponline.org.au.
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