We're rocking with Seattle's No. 1 prospect in our A's vs. Mariners prediction tonight.
The Seattle Mariners come into this one as 66-cent favorites, and for good reason — Jack Perkins leaves a lot to be desired for the A's.
Let’s dive into my MLB picks for Thursday, Sept. 3, and build that bankroll before the weekend.
Who will win A’s vs Mariners tonight: Mariners Moneyline (68%)
For help understanding probabilities, see our odds calculator.
Kade Anderson has been serviceable for the Seattle Mariners since his MLB debut, but he's in a perfect spot to finally put together a quality start against the Athletics, a team in the bottom 10 for wRC+.
While Anderson owns a 4.50 ERA through two starts, taking the hood off and looking underneath these surface stats indicates he's actually been better.
With a 2.28 xERA and .143 xBA, the Athletics may have a tough time stringing hits together tonight, leaving plenty of opportunity for Seattle's offense to stay hot after scoring 25 runs across its last three games.
Looking for more plays from the nightcap? Tap into my Cardinals vs. Dodgers prediction.
COVERS INTEL: Anderson throws a four-seamer-slider combo that's been getting the best of big-leaguers across his first two starts, with batters owning a .153 xBA or worse against each pitch.
A’s vs Mariners Over/Under pick: Under 7.5 (55%)
I get it, these pitchers aren't household names, but Anderson's underlying metrics look good, and Jack Perkins has a strong history against the Mariners.
Across 27 plate appearances, he's limited this Seattle offense to a .173 xBA and is striking them out at a 33% clip. This includes Julio Rodriguez, Cal Raleigh, and Josh Naylor, who are a combined 1-for-6 against the righty.
I'd play this Under up to 58 cents.
A’s vs Mariners home run prediction: Cal Raleigh (26%)
Raleigh is coming off an August tear, where he hit six homers in the last week of the month. Can he continue that tonight against Perkins?
Well, Perkins' barrel rate is in the 26th percentile among qualified pitchers, and his given up nine bombs on his four-seamer, a pitch Raleigh has hit 11 of his 20 homers on. If anyone is hitting a bomb, Raleigh has a great chance tonight.
- ML/RL bets: 8-10, -1.00 units
- Over/Under bets: 8-9, -1.32 units
A’s vs Mariners weather
We'll see some cold and rainy weather in Seattle tonight, with some potential for a delay before first pitch. Temperatures will sit at 62 degrees Fahrenheit.
A’s vs Mariners odds
- Moneyline: A’s 34% | Mariners 67%
- Run line: A’s +1.5 (54%) | Mariners -1.5 (47%)
- Over/Under: Over 7.5 (46%) | Under 7.5 (54%)
A’s vs Mariners trend
The Mariners are 5-1 in their last six games as a home favorite. Find more MLB betting trends for A’s vs. Mariners.
How to watch A’s vs Mariners and game info
| Location | T-Mobile Field, Seattle, WA |
| Date | Thursday, September 3, 2026 |
| First pitch | 9:40 p.m. ET |
| TV | NBC Sports California, Mariners.TV |
| A’s starting pitcher | Jack Perkins (3-10, 6.42 ERA) |
| Mariners starting pitcher | Kade Anderson (0-0, 4.50 ERA) |
A’s vs Mariners latest injuries
Odds are correct at the time of publishing and are subject to change.
Not intended for use in MA.
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