The Seattle Mariners continue their playoff push against the Athletics at T-Mobile Park on Friday, Sept. 4.
First pitch is set for 10:10 p.m. ET, and my top Athletics vs. Mariners predictions and MLB picks call for a low-scoring game.
Who will win Athletics vs Mariners today: Mariners moneyline (68%)
For help understanding probabilities, see our odds calculator.
Kade Morris has struggled to a 10.60 FIP and 2.85 WHIP against left-handed batters in 2026. Tonight, the Seattle Mariners are likely to have seven lefties in their lineup against Morris.
Behind Morris, the Athletics’ bullpen isn’t in great shape after using Hogan Harris, Luis Medina, and Scott Blewett twice each in the last three days. Chris Roycroft threw 39 pitches yesterday, too, which means he’s unlikely to be available here.
The A's offense has been underwhelming against right-handed pitching over the last 30 days, ranking 16th in wRC+.
Seattle has the better offense, the better starting pitcher, and a more rested arm barn, so they should be able to take care of business at home here. Play to 70%.
COVERS INTEL: The Athletics' bullpen ranks dead-last in ERA in 2026.
Athletics vs Mariners Over/Under pick: Under 7.5 (56%)
Logan Gilbert owns a 4.54 FIP at T-Mobile Park in 2026, but much of his struggles have been due to an inability to keep the ball in the yard.
Cooler temperatures in Seattle this evening should help mitigate that issue. The Athletics offense is a good matchup for Gilbert, too, ranking only 14th in ISO and 19th in home runs against right-handed pitching since the beginning of August.
If the bullpens for the Athletics and Mariners can avoid a late-inning meltdown, runs are likely to be at a premium. Play to 60%.
Athletics vs Mariners home run prediction: Cal Raleigh (21%)
Cal Raleigh leads all of baseball with a 32.1% barrel rate against right-handed pitching during the last 30 days (min. 20 plate appearances). Raleigh didn’t catch a barrel yesterday, but both of his balls in play were 95+ mph off the bat.
Morris has allowed a 37.2% fly-ball rate against left-handed hitters this season. There is a good chance we see Raleigh leave the yard this evening.
Play to 24%.
Athletics vs Mariners weather
T-Mobile Park has a retractable roof, but the design of the stadium preserves an open-air environment. That means the outside weather still has an impact on the playing field for home games. Cooler temperatures forecasted for Friday in Seattle slightly favor pitching.
Athletics vs Mariners odds
- Moneyline: Athletics 34% | Mariners 67%
- Run line: Athletics +1.5 | Mariners -1.5
- Over/Under: Over 7.5 | Under 7.5
Athletics vs Mariners trend
The Athletics have only hit the F5 moneyline in 15 of their last 50 games (-9.70 Units / -19% ROI). Find more MLB betting trends for Athletics vs. Mariners.
How to watch Athletics vs Mariners and game info
| Location | T-Mobile Park, Seattle, Wash. |
| Date | Friday, Sept. 4, 2026 |
| First pitch | 10:10 p.m. ET |
| TV | NBC Sports California, Mariners.TV |
| Athletics starting pitcher | Kade Morris (0-1, 9.82 ERA) |
| Mariners starting pitcher | Logan Gilbert (11-8, 3.42 ERA) |
Athletics 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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