The first-place Milwaukee Brewers are priced as a -150 moneyline favorite tonight against the Seattle Mariners, with first pitch scheduled for 7:40 p.m. ET at American Family Field.
With Kyle Harrison in top form at home this season, my Mariners vs. Brewers predictions are backing him to silence Seattle while getting run support.
Read more in my MLB picks for Tuesday, Aug. 18.
Who will win Mariners vs Brewers today: Brewers moneyline (-155)
The Seattle Mariners send Bryce Miller to the hill, and he is still looking to find his form. The righty owns a 4.45 FIP across his last two starts while giving up 1.64 HR/9, and his monthly FIP sits at 5.71.
The Milwaukee Brewers aren't in great offensive shape, but the Brewers are much better at home with a 111 wRC+, compared to a 95 road mark.
Kyle Harrison has a 4.01 xERA over his last two appearances, but has been a completely different pitcher at American Family Field, posting a 2.14 home FIP compared to a 4.87 mark on the road.
Harrison should bring his best, and Milwaukee can capitalize on Miller’s recent struggles.
Play this pick to -160.
COVERS INTEL: Miller has a 4.66 FIP on the road, compared to a 2.88 mark at T-Mobile Park. That gives Milwaukee's lineup another advantage. 
Mariners vs Brewers Over/Under pick: Over 7.5 (-112)
This total sits at 7.5, and it's low enough to hammer the Over. Milwaukee’s offense has been cold lately with a 74 wRC+ over its last six games, but the Brewers are much better at home, which gives them a path against a struggling Miller.
Seattle’s offense is also in solid form, posting a 122 wRC+ over the last week. Harrison has been better at American Family Field, but the Mariners are seeing the ball well enough to contribute.
The bullpen edge is not overwhelming either, with Seattle’s relief corps owning a 4.55 FIP over the last two weeks.
Play this pick to -130.
- ML/RL bets: 50-64, -21.47 units
- Over/Under bets: 63-48, +6.04 units
Mariners vs Brewers weather
Weather at American Family Field looks messy early, with rain chances around 54% at 7 p.m. ET before gradually dropping later in the night. Temperatures sit in the low 70s with moderate winds, but the retractable roof could easily neutralize those conditions.
Mariners vs Brewers odds
- Moneyline: Mariners +144 | Brewers -150
- Run line: Mariners +1.5 (-156) | Brewers -1.5 (+150)
- Over/Under: Over 7.5 (-108) | Under 7.5 (+104)
Mariners vs Brewers trend
The Mariners have hit the Over in 24 of their last 40 away games (+9.05 Units / 21% ROI). Find more MLB betting trends for Mariners vs. Brewers.
How to watch Mariners vs Brewers and game info
| Location | American Family Field, Milwaukee, WI |
| Date | Tuesday, Aug. 18, 2026 |
| First pitch | 7:40 p.m. ET |
| TV | Mariners.TV, Brewers.TV |
| Mariners starting pitcher | Bryce Miller (4-6, 3.39 ERA) |
| Brewers starting pitcher | Kyle Harrison (9-3, 3.47 ERA) |
Mariners vs Brewers 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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