The Seattle Mariners hope to break out of a funk as they host the San Francisco Giants on Saturday night at T-Mobile Park.
The market expects Seattle (-133) to do just that with Bryan Woo on the bump, but his recent form has been shaky.
See where I'm finding value with my Giants vs. Mariners predictions & MLB picks for Saturday, June 18.
Who will win Giants vs Mariners today: Giants moneyline (+124)
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The San Francisco Giants have been the higher-performing ball club lately, which isn't accurately accounted for in the pricing of this game.
They're in fine form at the plate, with a 112 wRC+ against right-handed pitching in July, whereas the Seattle Mariners are riding the struggle bus (67 wRC).
There's also a major discrepancy in the bullpen, where Seattle's grotesque 4.60 SIERA this month pales in comparison to San Francisco's (3.10).
Bryan Woo has a 5.88 ERA since the start of June, so he's hardly an advantage over ace Logan Webb. Play the underdog to +110.
COVERS INTEL: Logan Webb's sinker is his lead offering (31.3%), and he should utilize it to great effect against a Seattle lineup that struggles against sinkers (-22.8 runs above average, 27th in the MLB).Giants vs Mariners Over/Under pick: Over 7.5 (+119)
Don't automatically expect a very low-scoring game just because both starting pitchers have notable names.
Woo has been an overvalued asset in betting markets while he's been struggling this summer. The Mariners have played to the Over in five of his six outings since the start of June, and now there's plus money available for them to do so again with a low total of 7.5.
Webb also hasn't been at the peak of his powers in his last two starts, surrendering 12 earned runs on 16 hits with just four strikeouts.
Seattle's bullpen has fallen apart lately, and San Francisco's has been poor overall (4.45 ERA) despite stronger underlying numbers lately.
- ML/RL bets: 26-28, -6.2 units
- Over/Under bets: 35-20, +13.6 units
Giants vs Mariners weather
Giants vs Mariners odds
- Moneyline: San Francisco +127 | Seattle -133
- Run line: San Francisco +1.5 (-178) | Seattle -1.5 (+170)
- Over/Under: Over 7.5 (+122) | Under 7.5 (-127)
Giants vs Mariners trend
The Mariners are 1-6 in their last seven games. Find more MLB betting trends for Giants vs. Mariners.
How to watch Giants vs Mariners and game info
| Location | T-Mobile Park, Seattle, WA |
| Date | Saturday, July 18, 2026 |
| First pitch | 8:08 p.m. ET |
| TV | FOX |
| Giants starting pitcher | Logan Webb (5-7, 3.86 ERA) |
| Mariners starting pitcher | Bryan Woo (7-6, 4.23 ERA) |
Giants vs Mariners latest injuries
Odds are correct at the time of publishing and are subject to change.
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